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                       SECURITIES AND EXCHANGE COMMISSION
                                  SCHEDULE 14A
                                 (RULE 14A-101)

                     INFORMATION REQUIRED IN PROXY STATEMENT

                            SCHEDULE 14A INFORMATION
  PROXY STATEMENT PURSUANT TO SECTION 14 OF THE SECURITIES EXCHANGE ACT OF 1934

                           Filed by the Registrant /x/
                 Filed by a Party other than the Registrant / /

                           Check the appropriate box:

               /x/    Preliminary Proxy Statement
               / /    Confidential, for the use of the Commission
                      only (as permitted by Rule 14a-6(e)(2))
               / /    Definitive Proxy Statement
               / /    Definitive Additional Materials
               / /    Soliciting Material Pursuant to Rule 14a-12

                      INTERNATIONAL SPECIALTY PRODUCTS INC.
                ------------------------------------------------
                (Name of Registrant As Specified In Its Charter)


    ------------------------------------------------------------------------
    (Name of Person(s) Filing Proxy Statement, if other than the Registrant)

               Payment of Filing Fee (Check the appropriate box):

               / /    No fee required.
               /x/    Fee computed on table below per Exchange Act
                      Rules 14a-6(i)(1) and 0-11.

               (1) Title of each class of securities to which transaction
               applies:
               Common Stock, par value $0.01 per share of International
               Specialty Products Inc.
               (2) Aggregate number of securities to which transaction applies:
               12,810,336 Shares of International Specialty Products Inc. Common
               Stock, options to purchase 1,700,156 shares of Common Stock
               (3) Per unit price or other underlying value of transaction
               computed pursuant to Exchange Act Rule 0-11 (set forth the amount
               on which the filing fee is calculated and state how it was
               determined):
               The transaction valuation was based upon the sum of (i) the
               product of 12,810,336 shares of International Specialty
               Products Inc. Common Stock at a price of $10.30 per share in cash
               and (ii) a cash-out of 1,700,156 shares of Common Stock covered
               by outstanding options at an aggregate cost of $2,414,103.
               (4) Proposed maximum aggregate value of transaction:
               $134,360,564
               (5) Total fee paid:
               $26,873:
               / / Fee paid previously with preliminary materials.
               / / Check box if any part of the fee is offset as provided by
               Exchange Act Rule 0-11(a)(2) and identify the filing for which
               the offsetting fee was paid previously. Identify the previous
               filing by registration statement number, or the form or schedule
               and the date of its filing.
               (1) Amount previously paid: N/A
               (2) Form, Schedule or Registration Statement No.: N/A
               (3) Filing party: N/A
               (4) Date filed: N/A



                                  [LOGO OF ISP]

                                 1361 Alps Road
                                Wayne, New Jersey
                                      07470

Fellow Stockholder:

     You are cordially  invited to attend a special  meeting of  stockholders of
International Specialty Products Inc. ("ISP"), to be held on _________, 2003, at
_ _.m., local time, at _________.

     At the  special  meeting,  you will be asked to  consider  and vote  upon a
proposal  to adopt and  approve the  Agreement  and Plan of Merger,  dated as of
November 8, 2002, between ISP and International Specialty Products Holdings Inc.
("ISPH").  Samuel J. Heyman, our Chairman,  formed ISPH for purposes of entering
into this transaction and is currently the sole  "beneficial  owner" (as defined
in Rule 13d-3 under the Securities Exchange Act of 1934) of all of ISPH's common
stock and approximately  81% of ISP's common stock.  Under the merger agreement,
ISPH will be merged with and into ISP, with ISP as the surviving corporation.

     In the merger,  you will be  entitled to receive  $10.30 per share in cash,
without  interest,  for each share of ISP common stock that you own.  This price
represents  a 30% premium  over the closing  price per share of $7.95 on July 8,
2002, the last trading day before Mr.  Heyman's  public  proposal to acquire the
shares of ISP that he does not already beneficially own. No merger consideration
will be paid for shares Mr. Heyman  beneficially owns at the time of the merger,
except shares held by qualified charitable organizations (which will be entitled
to receive the $10.30 per share merger consideration).  SINCE YOU WILL ONLY HAVE
THE RIGHT TO RECEIVE CASH IN THE MERGER,  AFTER THE MERGER  OCCURS,  YOU WILL NO
LONGER BE A STOCKHOLDER OF ISP AND MR. HEYMAN WILL BE THE SOLE BENEFICIAL  OWNER
OF ISP.

     Based on the number of our  outstanding  shares of common stock and options
to  purchase  common  stock,  the  aggregate  cash  consideration  to be paid in
connection with the merger is approximately $134.4 million.

     Details  of the  merger  and the  merger  agreement  are  discussed  in the
accompanying  proxy  statement.  A copy of the merger  agreement  is attached as
Exhibit A to the proxy  statement.  We encourage you to read the proxy statement
and the merger agreement carefully.

     The  receipt of cash in  exchange  for your  shares of common  stock in the
merger  will  constitute  a taxable  transaction  for U.S.  federal  income  tax
purposes.  Please read the accompanying proxy statement  carefully regarding the
tax consequences of the merger.

     Our board of directors formed a special committee of independent  directors
who are not officers or employees of ISP and who are  otherwise  independent  of
Mr.  Heyman to review and  evaluate  the merger  and the merger  agreement.  The
special  committee  unanimously  recommended  to our board of directors that the
merger  agreement be approved.  In connection with its evaluation of the merger,
the special  committee  engaged Lehman  Brothers Inc. as its financial  advisor.
Lehman  Brothers has rendered its opinion  that,  as of the date of that opinion
and, based upon and subject to the assumptions,  limitations and  qualifications
set forth in that  opinion,  the $10.30 per share cash merger  consideration  is
fair, from a financial point of view, to the  stockholders of ISP other than Mr.
Heyman and his affiliates. The written opinion of Lehman Brothers is attached as
Annex B to the accompanying  proxy  statement,  and you should read it carefully
for  a  discussion  of  the  assumptions  made,  procedures  followed,   factors
considered  and  limitations  upon the review  undertaken by Lehman  Brothers in
rendering its opinion.

     Our  board of  directors,  based  on the  unanimous  recommendation  of the
special committee,  has unanimously (with Mr. Heyman and me abstaining) approved
and declared the advisability of the merger and the merger agreement.  The board
of directors and special  committee believe that the terms of the merger and the
merger agreement are fair to, and in the best interests of, ISP's  stockholders,
other than Mr. Heyman and his affiliates. Our board of directors recommends that
the  stockholders of ISP vote "FOR" the adoption of the merger  agreement.  When
you  consider the  recommendation  of our board of directors to adopt the merger
agreement, you should be aware that some of our directors and executive officers
have  interests  in the merger that may be different  than the  interests of our
stockholders generally.



     Your vote is very  important.  We cannot  complete  the  merger  unless the
merger  agreement is adopted and approved by the affirmative  vote of a majority
of the  outstanding  shares of ISP common  stock.  As of the record date for the
special meeting, Mr. Heyman and our directors and officers  beneficially owned a
total of _ shares,  which is  approximately  _% of all outstanding  shares.  Mr.
Heyman has agreed to vote all of the shares of common stock  beneficially  owned
by him at the  time  of the  special  meeting  (but  excluding  shares  held  by
qualified  charitable  organizations) in favor of the merger, and we also expect
our  directors  and  executive  officers  to vote for the  transaction.  If that
occurs,  we will have  obtained the  requisite  vote under the Delaware  General
Corporation  Law.  In  addition,  while not  required  by the  Delaware  General
Corporation Law or ISP's charter or by-laws, the merger also is conditioned upon
the  affirmative  vote of a  majority  of shares of common  stock  voting on the
merger at the special  meeting that are not owned  beneficially  or of record by
Mr. Heyman or any other officer or director of ISP or ISPH.

     Please  complete and sign the enclosed  proxy card and return it as soon as
possible  in the  enclosed  postage  paid  envelope.  This will ensure that your
shares are represented at the special meeting.

                                          Sincerely,

                                          /s/ SUNIL KUMAR
                                          --------------------
                                          Sunil Kumar
                                          PRESIDENT AND CHIEF EXECUTIVE OFFICER

     This  proxy  statement  is dated _,  200_,  and is first  being  mailed  to
stockholders of ISP on or about _, 200_.

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THIS  TRANSACTION  HAS NOT BEEN APPROVED OR  DISAPPROVED  BY THE  SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES  COMMISSION.  NEITHER THE SECURITIES
AND EXCHANGE COMMISSION NOR ANY STATE SECURITIES  COMMISSION HAS PASSED UPON THE
FAIRNESS OF MERITS OF THIS  TRANSACTION  OR UPON THE ACCURACY OR ADEQUACY OF THE
INFORMATION CONTAINED IN THIS DOCUMENT.  ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE.

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                                  [LOGO OF ISP]

                                 1361 Alps Road
                                Wayne, New Jersey
                                      07470

                    NOTICE OF SPECIAL MEETING OF STOCKHOLDERS

     A special meeting of stockholders of International  Specialty Products Inc.
will be held at __ ___.m., local time,  ____________,  2003 at _____________ for
the following purposes:

o    To vote on a proposal to adopt the Agreement  and Plan of Merger,  dated as
     of  November  8,  2002,  by and  between  ISP and  International  Specialty
     Products Holdings Inc.; and

o    To consider any other matters that are properly  brought before the special
     meeting or any adjournments or postponements of the special meeting.

     Our board of  directors  has fixed the close of business on  _____________,
2002 as the record date for the determination of stockholders entitled to notice
of, and to vote at, the special meeting and any adjournments or postponements of
the special meeting.

     The accompanying  proxy statement forms a part of this notice.  We urge you
to read it carefully.

     Under Delaware law, holders of our common stock who do not vote in favor of
the merger  agreement will have the right to seek appraisal of the fair value of
their shares as  determined  by the Delaware  Court of Chancery if the merger is
completed,  but only if they submit a written demand for such an appraisal prior
to the vote on the merger  agreement and they comply with the other Delaware law
procedures   explained   in  the   accompanying   proxy   statement.   See  "The
Merger--Appraisal Rights" in the accompanying proxy statement and Annex D to the
proxy statement for more information  concerning appraisal rights under Delaware
law.



                                            By Order of the Board of Directors,

                                            /s/ RICHARD A. WEINBERG
                                            ---------------------------
                                            Richard A. Weinberg
                                            SECRETARY

Wayne, New Jersey
Dated _____________, 200_

     Return of your  signed  proxy is the only way your  shares  can be  counted
unless you personally cast a ballot at the meeting.

--------------------------------------------------------------------------------

YOUR VOTE IS  IMPORTANT.  WHETHER OR NOT YOU INTEND TO BE PRESENT AT THE SPECIAL
MEETING, PLEASE COMPLETE THE ENCLOSED PROXY CARD AND SIGN, DATE AND RETURN IT IN
THE ENVELOPE PROVIDED, WHICH REQUIRES NO POSTAGE IF MAILED IN THE UNITED STATES.

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                                TABLE OF CONTENTS



                                                                                    PAGE

                                                                                   
SUMMARY TERM SHEET ...............................................................    1
   The Merger ....................................................................    1
   What You Will Be Entitled to Receive in the Merger ............................    1
   Recommendations of the Special Committee and our Board of Directors ...........    1
   Opinion of Lehman Brothers Inc. ...............................................    1
   Our Position as to the Fairness of the Merger .................................    2
   Mr. Heyman and ISPH's Position as to the Fairness of the Merger ...............    2
   Interests of Directors and Executive Officers in the Merger ...................    2
   Material U.S. Federal Income Tax Consequences .................................    3
   Appraisal Rights ..............................................................    3
   The Special Meeting ...........................................................    3
   Accounting Treatment ..........................................................    4
   The Merger Agreement ..........................................................    5
   Information About ISP, Mr. Heyman and ISPH ....................................    6
   Selected Consolidated Financial Data of ISP ...................................    6
   Trading Market and Price; Dividends ...........................................    7

SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS ................................    8

SPECIAL FACTORS ..................................................................    9
   Background of the Merger ......................................................    9
   Recommendations of the Special Committee and our Board of Directors ...........   15
   Special Committee's Position as to Fairness of the Merger .....................   16
   Majority Stockholder and ISPH's Positions as to the Fairness of the Merger ....   16
   Opinion of Lehman Brothers ....................................................   18
   ISP's Forecasts ...............................................................   23
   Reasons for the Merger; Purpose and Structure of the Merger ...................   25
   Effects of the Merger; Plans or Proposals After the Merger ....................   26
   Interests of Directors and Executive Officers in the Merger ...................   26
   Material U.S. Federal Income Tax Consequences of the Merger to our Stockholders   27
   Litigation ....................................................................   28

THE SPECIAL MEETING ..............................................................   29
   Date, Time and Place of the Special Meeting ...................................   29
   Proposal to be Considered at the Special Meeting ..............................   29
   Record Date ...................................................................   29
   Voting Rights; Vote Required for Approval .....................................   29
   Voting and Revocation of Proxies ..............................................   30
   Solicitation of Proxies .......................................................   30



                                       i




                                                                                    PAGE

                                                                                  
THE MERGER .......................................................................   31
   Effective Time of Merger ......................................................   31
   Payment of Merger Consideration and Surrender of Stock Certificates ...........   31
   Accounting Treatment ..........................................................   32
   Fees and Expenses of the Merger ...............................................   32
   Financing of the Merger .......................................................   32
   Appraisal Rights ..............................................................   32
   Regulatory Approvals and Other Consents .......................................   35
   The Merger Agreement ..........................................................   35

OTHER MATTERS ....................................................................   41
   Security Ownership of Specified Beneficial Owners and Management ..............   41
   Transactions in Capital Stock by Certain Persons ..............................   42
   Certain Transactions ..........................................................   42
   Future Stockholder Proposals ..................................................   44
   Independent Auditors ..........................................................   44

WHERE YOU CAN FIND MORE INFORMATION ..............................................   45
   Annex A--Agreement and Plan of Merger .........................................   A-1
   Annex B--Opinion of Lehman Brothers Inc. ......................................   B-1
   Annex C--Stockholder Voting Agreement .........................................   C-1
   Annex D--Section 262 of the Delaware General Corporation Law ..................   D-1



                                       ii


                               SUMMARY TERM SHEET

     This  summary term sheet  highlights  important  information  in this proxy
statement and does not contain all of the information  that is important to you.
You should carefully read this entire proxy statement and the other documents we
refer you to for a more complete  understanding  of the matters being considered
at the special  meeting.  In addition,  we  incorporate  by reference  important
business and financial information about International  Specialty Products Inc.,
or ISP, into this proxy statement.  You may obtain the information  incorporated
by  reference  into  this  proxy  statement  without  charge  by  following  the
instructions in the section entitled "Where You Can Find More Information."

THE MERGER (SEE PAGE 31)

     In the merger,  International  Specialty  Products  Holdings Inc., or ISPH,
will merge into ISP, with ISP as the surviving corporation in the merger.

     As a result of the merger,  we will cease to be a publicly held company and
will become a private corporation. Our Chairman and major stockholder, Samuel J.
Heyman, will beneficially own all of our stock after the merger. Throughout this
proxy  statement,  Mr. Heyman is referred to  alternatively as Mr. Heyman or the
Majority Stockholder.

WHAT YOU WILL BE ENTITLED TO RECEIVE IN THE MERGER (SEE PAGE 31)

     If we complete the merger,  holders of our common stock, other than holders
of common stock  beneficially  owned by Mr.  Heyman and other than  stockholders
that validly  exercise  appraisal rights under Delaware law, will be entitled to
receive  $10.30 in cash for each share of common stock that they own.  Shares of
common stock  beneficially owned by Mr. Heyman will be cancelled for no payment,
except  shares  held  by  qualified  charitable  organizations  (which  will  be
converted into the $10.30 per share cash merger consideration).

RECOMMENDATIONS  OF THE SPECIAL  COMMITTEE AND OUR BOARD OF DIRECTORS  (SEE PAGE
15)

     Because Mr.  Heyman was making the merger  proposal and because Mr.  Heyman
and Sunil Kumar, ISP's President and Chief Executive Officer, are both directors
of ISP and ISPH,  our board of  directors  established  a special  committee  to
consider and evaluate the proposed  merger.  The special  committee  consists of
three of our directors who are not members of our management or affiliated  with
Mr. Heyman. After careful consideration, the special committee unanimously:

     o    determined  that the merger  agreement and the merger are fair to, and
          in the best interests of, the holders of our common stock,  other than
          Mr. Heyman and his affiliates, and

     o    recommended to our board of directors that it

          -  approve the terms of the merger agreement and the merger,

          -  declare its advisability and

          -  recommend that our stockholders vote to approve and adopt the
             merger agreement.

     Based on this  unanimous  recommendation,  our  board of  directors  by the
unanimous  vote of all  directors  other than  Messrs.  Heyman  and  Kumar,  who
abstained from the vote, determined the merger agreement to be advisable and the
terms and  conditions of the merger to be fair to, and in the best interests of,
the holders of our common stock,  other than Mr. Heyman and his affiliates,  and
approved the merger agreement.  ACCORDINGLY,  OUR BOARD OF DIRECTORS  RECOMMENDS
THAT YOU VOTE "FOR" THE PROPOSAL TO ADOPT THE MERGER AGREEMENT.

     For a  discussion  of  the  material  factors  considered  by  the  special
committee  and our board of  directors  in reaching  their  conclusions  and the
reasons why the special committee and the board of directors determined that the
merger is fair, see "Special  Factors--Recommendations  of the Special Committee
and our Board of Directors."

OPINION OF LEHMAN BROTHERS INC. (SEE PAGE 18)

     In  connection  with the  merger,  the special  committee  and our board of
directors   considered  the  opinion  of  Lehman   Brothers  Inc.,  the  special
committee's financial advisor.  Lehman Brothers delivered its written opinion to
the special  committee on November 8, 2002 to the effect that,  as of that date,
the $10.30 per share cash merger  consideration  is fair, from a financial point
of view,  to the holders of ISP's common  stock,  other than Mr.  Heyman and his
affiliates. You should be aware, however,


                                       1


that  the  opinion  was  based on and  subject  to  important  assumptions,
limitations  and  qualifications.  The full text of this  opinion is attached as
Annex B to this  proxy  statement.  We urge  you to  read  that  opinion  in its
entirety for a description of the assumptions made, procedures followed, factors
considered and limitations on the review undertaken.

OUR POSITION AS TO THE FAIRNESS OF THE MERGER (SEE PAGE 15)

     We believe  the merger is fair to the  holders of our common  stock,  other
than  Mr.  Heyman  and his  affiliates.  Many  facts  support  this  conclusion,
including:

     o    the proposed merger would entitle each  stockholder of ISP, other than
          holders  of common  stock  beneficially  owned by Mr.  Heyman  (except
          shares  held by  qualified  charitable  organizations,  which  will be
          converted  into the  $10.30 per share cash  merger  consideration)  to
          receive $10.30 in cash;

     o    the opinion of Lehman  Brothers to the effect that,  as of the date of
          the  opinion,   and  based  upon  and  subject  to  the   assumptions,
          limitations and qualifications  set forth in its written opinion,  the
          $10.30 per share cash merger  consideration  is fair, from a financial
          view,  to holders of our common  stock,  other than Mr. Heyman and his
          affiliates;

     o    the fact that the terms and  conditions  of the  proposed  merger were
          determined through  arm's-length  negotiations with Mr. Heyman and his
          representatives by the special committee; and

     o    the merger is conditioned  upon the affirmative  vote of a majority of
          shares of common  stock  voting on the merger at the  special  meeting
          that are not owned  beneficially  or of  record  by Mr.  Heyman or any
          other  officer or director of ISP or ISPH.  We refer to this  approval
          requirement as the majority of the minority condition.

MR. HEYMAN AND ISPH'S POSITION AS TO THE FAIRNESS OF THE MERGER (SEE PAGE 16)

     Although neither Mr. Heyman nor ISPH has performed,  or engaged a financial
advisor to perform,  any  valuation  analysis for the purposes of assessing  the
fairness of the merger to holders of ISP common stock, other than Mr. Heyman and
his affiliates,  both believe that the merger is substantively  and procedurally
fair to those holders.  Mr. Heyman and ISPH believe this conclusion is supported
by the factors described above and by other factors, including:

     o    the merger  consideration of $10.30 per share represents a 30% premium
          over our  common  stock's  $7.95  closing  price on the New York Stock
          Exchange  on July 8, 2002,  the last  trading  day  before Mr.  Heyman
          announced  his initial  merger  proposal,  and a 49% premium  over the
          average closing price for the 30 days prior to that announcement;

     o    the  S&P  500  Index  and the S&P  Midcap  Specialty  Chemicals  Index
          declined  5.5%  and  9.3%,  respectively,  between  July 8,  2002  and
          November 6, 2002 (the date the special  committee  agreed to recommend
          the merger agreement),  indicating that the premium represented by the
          $10.30  merger  consideration  might have been even  greater had ISP's
          common stock  performed  consistently  with the broader market and its
          industry peers in absence of the pending merger proposal;

     o    the merger was approved and  recommended by the special  committee and
          the board of directors; and

     o    stockholders who do not vote in favor of the merger would be entitled,
          subject to compliance  with certain  procedures  described  under "The
          Merger--Appraisal  Rights",  to exercise Delaware statutory  appraisal
          rights in the merger,  which allow stockholders to have the fair value
          of their shares  determined by the Delaware Court of Chancery and paid
          to them in cash.

INTERESTS OF DIRECTORS AND EXECUTIVE OFFICERS IN THE MERGER (SEE PAGE 26)

     In considering  the  recommendation  of our board of directors to adopt the
merger  agreement  so that the merger  can  occur,  you should be aware that our
executive  officers and directors have interests in the merger that may conflict
with the interests of our stockholders generally. These interests include:

     o    Mr. Heyman is the Chairman of our board of directors  and, as a result
          of the merger,  will increase his  beneficial  ownership of our common
          stock from approximately 81% to 100%;

     o    Mr.  Heyman and Mr.  Kumar are members of both ISP and ISPH's board of
          directors;

     o    each of ISPH's officers is also an officer of ISP;


                                       2


     o    some of our officers  and  directors  will  receive  cash  payments in
          connection  with the  merger in  exchange  for their  holdings  of our
          common  stock  or  stock   options,   as  described   under   "Special
          Factors--Interests of Directors and Executive Officers in the Merger";

     o    in addition,  officers and  directors  holding  restricted  ISP common
          stock have agreed to forfeit the stock in  connection  with the merger
          in exchange for a cash payment equal to the number of shares that were
          forfeited, multiplied by the merger consideration,  payable subject to
          the  vesting  restrictions  applicable  to the  underlying  restricted
          shares; and

     o    after the merger, ISP will continue  indemnification  arrangements and
          directors'  and  officers'  liability  insurance  for our  present and
          former directors and officers.

MATERIAL U.S. FEDERAL INCOME TAX CONSEQUENCES (SEE PAGE 27)

     The receipt of $10.30 in cash for each share of our common  stock  pursuant
to the  merger  will be a  taxable  transaction  for  U.S.  federal  income  tax
purposes.  For  U.S.  federal  income  tax  purposes,  each of our  stockholders
generally will realize  taxable gain or loss as a result of the merger  measured
by the difference,  if any,  between $10.30 per share and the adjusted tax basis
in that share owned by the  stockholder.  For additional  information  regarding
material U.S. federal income tax consequences of the merger to our stockholders,
see "Special  Factors--Material  U.S.  Federal  Income Tax  Consequences  of the
Merger to our Stockholders."

APPRAISAL RIGHTS (SEE PAGE 32)

     Stockholders  who  do  not  wish  to  accept  the  $10.30  per  share  cash
consideration  payable in the  merger may seek,  under  Delaware  law,  judicial
appraisal of the fair value of their  shares by the Delaware  Court of Chancery.
This value could be more or less than or the same as the merger consideration of
$10.30 in cash per share.  This "right of  appraisal"  is subject to a number of
restrictions  and  technical  requirements.  Generally,  in  order  to  exercise
appraisal rights, among other things:

     o    you must NOT vote in favor of the merger agreement;

     o    you must  make a written  demand  for  appraisal  in  compliance  with
          Delaware law before the vote on the merger agreement; and

     o    you must  continuously  hold your  shares  from the date of making the
          demand through the  effectiveness  of the merger. A stockholder who is
          the record  holder of shares of common  stock on the date the  written
          demand for  appraisal  is made,  but who  thereafter  transfers  those
          shares prior to the effectiveness of the merger will lose any right to
          appraisal in respect of those shares.

     Merely voting against the merger  agreement will not preserve your right of
appraisal under Delaware law. Also, since a submitted proxy not marked "against"
or  "abstain"  will be voted  for the  adoption  of the  merger  agreement,  the
submission  of a proxy not so marked  will  result  in the  waiver of  appraisal
rights.  If you hold shares in the name of a broker or other  nominee,  you must
instruct  your nominee to take the steps  necessary to exercise  your  appraisal
right.  If you or your nominee fails to follow all of the steps  required by the
statute, you will lose your right of appraisal.

     Annex D to this proxy statement  contains the Delaware  statute relating to
your right of appraisal.

THE SPECIAL MEETING (SEE PAGE 29)

     DATE, TIME, PLACE AND MATTERS TO BE CONSIDERED (SEE PAGE 29).

     Our special  meeting will be held at __________ on  __________,  2003 at _,
local time. At the special meeting, you will be asked to vote on the adoption of
the merger  agreement.  A copy of the merger agreement is attached as Annex A to
this proxy statement.

     RECORD DATE FOR VOTING (SEE PAGE 29).

     You may vote at the special meeting if you owned shares of our common stock
at the  close  of  business  on  __________,  2002.  On that  date,  there  were
__________ shares of our common stock outstanding.  Mr. Heyman beneficially owns
_ shares of our common stock.  Each share of common stock entitles the holder to
cast one vote at the special meeting.


                                       3


     PROCEDURES RELATING TO YOUR VOTE AT THE SPECIAL MEETING (SEE PAGE 29).

     o    In order to have a quorum at the  special  meeting,  a majority of all
          outstanding  shares  of  common  stock as of the  record  date must be
          present,  in person or by proxy. Mr. Heyman has agreed,  pursuant to a
          voting agreement, to cause all of the shares beneficially owned by him
          at the time of the meeting  (but  excluding  shares held by  qualified
          charitable  organizations)  to be represented in person or by proxy at
          the meeting.  Accordingly,  a quorum at the meeting is assured. A copy
          of  the  voting  agreement  is  attached  as  Annex  C to  this  proxy
          statement.

     o    In order to adopt the merger  agreement  under  Delaware  law, we must
          obtain the affirmative vote of the holders of a majority of the shares
          of  common  stock  outstanding  and  entitled  to vote at the  special
          meeting. As of the record date for the special meeting, Mr. Heyman and
          our  directors  and officers  beneficially  owned a total of _ shares,
          which is  approximately _% of all outstanding  shares.  Mr. Heyman has
          agreed in a voting  agreement to cause all of the shares  beneficially
          owned by him at the time of the special meeting (but excluding  shares
          held by qualified  charitable  organizations) to vote "FOR" the merger
          agreement,  which will assure  adoption of the merger  agreement under
          Delaware  law.  We also  expect  our  other  directors  and  executive
          officers to vote for the transaction.

     o    In addition,  although not required  under Delaware law or the amended
          and  restated  certificate  of  incorporation  or by-laws of ISP,  the
          merger agreement  requires that the majority of the minority condition
          must be satisfied before we can complete the merger.

     o    After carefully  reading and considering the information  contained in
          this proxy statement,  you should  complete,  date and sign your proxy
          card and mail it in the enclosed  return  envelope as soon as possible
          so that your shares are  represented at the special  meeting,  even if
          you plan to attend the  meeting in person.  Unless you  specify to the
          contrary,  all of your shares  represented  by valid  proxies  will be
          voted  "FOR"  the  adoption  of  the  merger  agreement.  Abstentions,
          failures to vote and broker  non-votes  will have the same effect as a
          vote  against the  adoption of the merger  agreement  for  purposes of
          obtaining  a  majority  of all shares of ISP  common  stock.  However,
          abstentions,  failures  to vote and broker  non-votes  will not affect
          satisfaction of the majority of the minority condition.

     o    If your shares are held in "street  name" by your broker,  your broker
          will vote your shares, but only if you provide written instructions to
          your broker on how to vote. You should follow the procedures  provided
          by your  broker  regarding  how to  instruct  it to vote your  shares.
          Without instructions, your shares will not be voted by your broker.

     o    Until exercised at the special meeting,  you can revoke your proxy and
          change your vote in any of the following ways:

          o    by delivering written notification of revocation to our Secretary
               at our  executive  offices at 1361 Alps Road,  Wayne,  New Jersey
               07470,

          o    by delivering a proxy of a later date,

          o    by  attending  the  special  meeting  and voting in person.  Your
               attendance at the meeting will not, by itself, revoke your proxy;
               you must vote in person at the meeting, or

          o    if you have instructed a broker to vote your shares, by following
               the  directions   received  from  your  broker  to  change  those
               instructions.

     For  additional  information  regarding the procedure for  delivering  your
proxy see "The  Special  Meeting--Voting  and  Revocation  of Proxies"  and "The
Special Meeting--Solicitation of Proxies."

     If you have more questions about the merger or how to submit your proxy, or
if you need additional copies of this proxy statement or the enclosed proxy card
or voting instructions,  you should contact Georgeson Shareholder Communications
Inc., 17 State Street - 10th Floor, New York, NY 10004, (212) 440-9800.

ACCOUNTING TREATMENT (SEE PAGE 32)

     We will account for the merger under the purchase method of accounting. See
"The Merger--Accounting Treatment."


                                       4


THE MERGER AGREEMENT (SEE PAGE 31)

     CONDITIONS TO THE MERGER (SEE PAGE 39).

     The  completion of the merger  depends on the  satisfaction  or waiver of a
number of conditions, including the following:

     o    we must  obtain the  affirmative  vote of the holders of a majority of
          the outstanding shares of ISP common stock;

     o    the majority of the minority condition must be satisfied;

     o    no injunction or similar  prohibition  to completion of the merger may
          be in effect and no  proceeding by a  governmental  authority may have
          been commenced seeking to impose such an injunction or prohibition;

     o    our and ISPH's respective representations and warranties in the merger
          agreement must be true and correct,  subject to exceptions  that would
          not  have  a  material   adverse   effect  on  the  party  making  the
          representations or warranties or the consummation of the merger; and

     o    we and ISPH must each be in compliance  in all material  respects with
          our respective covenants in the merger agreement.

     TERMINATION OF THE MERGER AGREEMENT (SEE PAGE 39).

     We (with  the  approval  of the  special  committee)  and ISPH may agree to
terminate the merger agreement at any time before the completion of the merger.

     ISPH may terminate the merger agreement without our consent if our board of
directors or the special committee withdraws, qualifies or modifies its approval
of the merger agreement or its recommendation to ISP's stockholders to adopt the
merger  agreement,  or publicly  proposes to do so, or takes any other action or
makes any other statement  inconsistent with that  recommendation.  However,  if
ISPH chooses not to terminate the merger agreement in such an event, we will not
be entitled to terminate the merger agreement and will be required to submit the
merger agreement to our stockholders for consideration at the special meeting.

      In addition,  we (with the approval of the special  committee) or ISPH may
terminate the merger agreement by written notice to the other if:

     o   any  governmental  entity  issues a final  nonappealable  injunction or
         other governmental order permanently enjoining or otherwise prohibiting
         the merger;

     o   the  merger is not  completed  on or before  May 31,  2003,  unless the
         failure  to  complete  the  merger is due to the  failure  of the party
         seeking to terminate  the merger  agreement to fulfill its  obligations
         under the merger agreement;

     o   the other  party  materially  breaches a  representation,  warranty  or
         covenant in the merger  agreement and the breach is not cured within 30
         days  after  notice of the  breach or cannot be cured  prior to May 31,
         2003; or

     o   at the  special  meeting,  the merger  agreement  is not adopted by the
         required  votes of the  holders of ISP common  stock;  except that this
         right to  terminate  will not be  available  to ISPH if Mr.  Heyman has
         failed to cause the shares beneficially owned by him at the time of the
         special  meeting (but  excluding  shares held by  qualified  charitable
         organizations)  to  vote  in  favor  of  the  adoption  of  the  merger
         agreement.

     EFFECT OF TERMINATION (SEE PAGE 40).

     If the merger  agreement is terminated by either ISP or ISPH, there will be
no liability  on the part of ISP,  ISPH or any of their  affiliates,  directors,
officers,  employees or  stockholders.  However,  no party will be relieved from
liability for willful breaches of the merger agreement.


                                       5


INFORMATION ABOUT ISP, MR. HEYMAN AND ISPH

     o    ISP.  ISP,   formerly  known  as  ISP  Holdings  Inc.,  is  a  leading
          multinational   manufacturer   of  specialty   chemicals  and  mineral
          products.  We are a  Delaware  corporation  incorporated  in 1996.  We
          operate  our  business   exclusively   through   direct  and  indirect
          subsidiaries.  The  address  and  telephone  number  of our  principal
          executive  offices are 300  Delaware  Avenue,  Suite 303,  Wilmington,
          Delaware 19801 (302) 427-5715.

     o    SAMUEL J. HEYMAN.  Mr.  Heyman has been a director and Chairman of the
          Board of Directors of ISP since its formation. Mr. Heyman beneficially
          owns  approximately  81%  of  ISP's  common  stock.  The  address  and
          telephone number for Mr. Heyman are 1361 Alps Road,  Wayne, New Jersey
          07470 (800) 526-5315.

     o    ISPH. ISPH is a Delaware corporation, all of the common stock of which
          is beneficially  owned by Mr. Heyman.  ISPH was formed for the purpose
          of  facilitating  a  transaction  with ISP and has not  engaged in any
          business  except  in  furtherance  of  the  merger.  The  address  and
          telephone  number  of  ISPH's  principal  executive  offices  are 2711
          Centerville  Road,  Suite  400,   Wilmington,   Delaware  19808  (302)
          636-5400.

SELECTED CONSOLIDATED FINANCIAL DATA OF ISP

     Set forth below are our selected consolidated  financial data. The selected
financial data were derived from the historical financial statements and related
notes of ISP. On July 15, 1998,  International  Specialty  Products Inc.  merged
with  and  into ISP  Holdings  Inc.,  which  changed  its name to  International
Specialty  Products  Inc.  The  financial  data for periods  prior to the merger
represent the results of the former ISP Holdings Inc. Interim unaudited data for
the nine months ended September 29, 2002 and September 30, 2001 reflect,  in the
opinion of our management,  all adjustments (consisting only of normal recurring
adjustments)  necessary for a fair  presentation  of that data.  Results for the
nine months ended  September 29, 2002 do not necessarily  indicate  results that
may be obtained for any other interim period or for the year as a whole.




                                   NINE MONTHS ENDED
                               ------------------------
                                SEPTEMBER    SEPTEMBER                     YEAR ENDED DECEMBER 31,
                                 29, 2002    30, 2001       -------------------------------------------------------
                               (UNAUDITED)   (UNAUDITED)     2001        2000       1999        1998        1997
                               -----------   -----------    -------    -------     -------     -------     -------
                                                      ($ in thousands, except per share and ratio data)
                                                                                         
OPERATING DATA:
Net Sales ...................   $ 642,211    $ 595,124   $ 787,216   $ 783,941   $ 787,356   $ 784,616   $ 708,971
Gross Profit ................     226,074      224,633     286,379     269,054     304,959     321,105     295,199
Operating Income ............     110,650       92,004     112,589      81,353     145,978      66,177     137,689
Interest Expense ............      64,604       62,780      86,198      81,166      78,552      75,564      73,612
Income from Continuing
  Operations Before
  Extraordinary Item and
  Cumulative Effect of Change
  in Accounting Principle ...      43,545       21,178         607      94,106      49,632       2,779      51,702
Net Income (Loss) ...........    (116,580)      20,738         167      94,106      74,930       4,812      54,005
OTHER DATA:
Depreciation ................   $  42,503    $  39,542   $  53,120   $  51,293   $  48,590   $  49,272   $  41,236
Amortization of Goodwill and
  Intangibles ...............         680       12,144      17,229      16,192      16,344      15,025      13,294
Capital Expenditures and
  Acquisitions ..............      42,551       58,716     101,375      58,382     108,955     163,850      67,674
Ratio of Earnings to
  Fixed Charges(1) ..........       1.95x        1.48x       1.01x       2.64x       1.88x       1.32x       2.39x
COMMON STOCK DATA, PER SHARE:
Income from Continuing
  Operations:
  Basic......................   $     .67    $     .32   $     .01   $    1.38   $     .72   $     .05   $     .96
  Diluted ...................         .67          .32         .01        1.38         .72         .05         .96
  Book Value(2) .............   $    8.14    $    9.01   $    9.33   $   10.41   $    8.54   $    7.29   $    4.86



                                       6




                                      SEPTEMBER    SEPTEMBER                          DECEMBER 31,
                                      29, 2002     30, 2001     -----------------------------------------------------
                                     (UNAUDITED)  (UNAUDITED)    2001        2000       1999        1998        1997
                                       -------      -------     ------    -------     -------     -------     -------
                                                                      ($ in thousands)
                                                                                       
BALANCE SHEET DATA:
Total Working Capital .............  $  602,184  $  462,447  $  564,516 $  339,751  $  438,083  $  406,654  $  322,080
Total Assets ......................   1,846,705   2,134,468   2,172,568  1,960,284   1,835,308   1,763,870   1,483,977
Long-Term Debt Less
  Current Maturities ..............     834,332     912,540     919,557    524,780     820,141     896,095     798,762
Stockholders' Equity ..............     529,621     588,122     604,057    691,335     587,261     501,723     261,841



-------------
(1)  For  purposes  of  calculating  the  ratio of  earnings  to fixed  charges,
     "earnings"  consist of income  from  continuing  operations  before  income
     taxes,  plus fixed  charges.  Fixed  charges  consist of  interest  expense
     (including  amortization of debt issuance costs), plus capitalized interest
     and that  portion  of  lease  rental  expense  representative  of  interest
     (estimated to be one-third of lease rental expense).

(2)  Book value per share of common stock  outstanding  is  calculated  as total
     common stockholders' equity divided by the number of shares of common stock
     outstanding at the end of the period.

TRADING MARKET AND PRICE; DIVIDENDS

     Our common stock is traded on the New York Stock  Exchange under the symbol
"ISP." We have set forth below our quarterly per share data:

                                                           SALES PRICE
                                                           -----------
                                                    HIGH               LOW
                                                   -------           -------
  2002
  Fourth Quarter (through
    November 26, 2002) .........................    $10.19            $8.90
  Third Quarter ................................     10.80             7.48
  Second Quarter ...............................     10.20             5.45
  First Quarter ................................      9.83             8.20

 2001
  Fourth Quarter ...............................    $ 9.60            $7.85
  Third Quarter ................................     11.25             7.95
  Second Quarter ...............................     11.25             7.80
  First Quarter ................................      8.74             6.63

 2000
  Fourth Quarter ...............................    $ 7.00            $5.00
  Third Quarter ................................      6.19             5.31
  Second Quarter ...............................      6.50             5.19
  First Quarter ................................      9.31             5.75

    During the time periods set forth above,  ISP has paid no cash dividends to
holders of ISP common stock. On July 8, 2002, the last full trading day prior to
the initial  announcement of the merger  proposal,  the last reported sale price
per share was $7.95. On November 26, 2002, the most recent  practicable  trading
day prior to the date of this proxy statement, the last reported sales price per
share was $10.18. Stockholders should obtain current market price quotations for
the common stock in connection with voting their shares.

     The merger  agreement  provides that neither our board of directors nor any
committee of our board of directors  will declare or pay any dividend  until the
closing  of the  merger,  except  with  the  consent  of  ISPH.  Several  of our
significant  subsidiaries  are subject to  financial  and  operating  covenants,
including  limitations  on the  payment  of cash  dividends,  under  the  credit
agreement and indentures to which the subsidiaries are party.

     We have not  provided  any pro forma  data  giving  effect to the  proposed
merger.  We do not believe that  information is material to our  stockholders in
evaluating the merger agreement  because the proposed merger is all cash and, if
completed, our common stock would cease to be publicly traded.

     We also have not provided any separate financial information for ISPH since
it is a special purpose entity formed in connection with the proposed merger and
has no independent operations.


                                       7


                SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

     The Securities  and Exchange  Commission  encourages  companies to disclose
forward-looking  information so that investors can better understand a company's
future prospects and make informed  investment  decisions.  This proxy statement
contains "forward-looking  statements." These statements may be made directly in
this proxy  statement  referring to us, and they may also be made a part of this
proxy  statement by reference to other documents filed by us with the Securities
and Exchange  Commission,  which is known as  "incorporation  by reference." Any
reference to forward-looking statements is not covered by the Private Securities
Litigation  Reform Act of 1995 and is not covered by the safe harbor  provisions
of that act. No part of that act is incorporated  into, nor is it applicable to,
this proxy statement.

     Words such as  "anticipate,"  "estimate,"  "expect,"  "project,"  "intend,"
"plan," "believe," "target,"  "objective," "goal" and words and terms of similar
substance  used in  connection  with  any  discussion  of  future  operating  or
financial   performance,   or   the   consummation   of  the   merger   identify
forward-looking   statements.   Our  forward-looking  statements  are  based  on
management's  current  views about future  events and are subject to a number of
factors and  uncertainties  that could cause actual results to differ materially
from those  described in the  forward-looking  statements.  The following  risks
related to our  business,  among  others,  could cause or  contribute  to actual
results  differing  materially  from  those  described  in  the  forward-looking
statements:

     o    general economic, capital market and business conditions,

     o    risks arising from litigation or similar proceedings,

     o    risks and  uncertainties  inherent in the  satisfaction of the closing
          conditions to the merger and the consummation of the merger, and

     o    the  risks  and  uncertainties  disclosed  in  filings  by ISP and its
          subsidiaries  with the  Securities and Exchange  Commission  under the
          Securities Exchange Act of 1934.

     We  caution  you  not  to  place  undue  reliance  on  our  forward-looking
statements,  which speak only as of the date of this proxy statement or the date
of the document incorporated by reference in this proxy statement.  We are under
no obligation,  and expressly  disclaim any  obligation,  to update or alter any
forward-looking  statements,  whether  as a result  of new  information,  future
events or otherwise.

     For additional information about factors that could cause actual results to
differ materially from those described in the forward-looking statements, please
see the  quarterly  reports on Form 10-Q and the annual report on Form 10-K that
ISP and its subsidiary have filed with the Securities and Exchange Commission as
described under "Where You Can Find More Information."

     All forward-looking  statements  attributable to us or any person acting on
our  behalf  are  expressly  qualified  in  their  entirety  by  the  cautionary
statements contained or referred to in this section.


                                       8


                                 SPECIAL FACTORS

BACKGROUND OF THE MERGER

     Throughout  ISP's  existence  as a public  company,  the  market  value and
liquidity of ISP's common stock has been  negatively  impacted  generally by the
inherent  difficulty  of attracting  analyst and investor  interest to a company
with a majority  stockholder  and a small public float and, more  recently,  the
general  stock market  downturn.  As a result,  the  liquidity of the market for
ISP's common  stock has remained  consistently  limited,  with an average  daily
trading  volume of only 21,850 shares during the 360 days prior to July 8, 2002.
ISP has from time to time taken  steps to attempt to improve the  liquidity  and
trading  value of its common stock.  In  particular,  in 1998,  ISP explored the
possibility of publicly offering  additional shares of its common stock. At that
time, ISP filed a "shelf" registration  statement on Form S-3 with the SEC, but,
in light of market  conditions,  ISP concluded that such a public offering would
not be feasible.  Upon  concluding  that its common stock was undervalued in the
market,  ISP from  time to time  engaged  in share  repurchases  in an effort to
enhance  stockholder  value.  These  repurchases,  however,  further limited the
liquidity of the trading market for ISP's common stock.

     In light of the failure of the foregoing  actions to significantly  improve
the market  performance  of ISP's  common  stock,  and for the  reasons  further
described  below under  "Reasons  for the Merger;  Purpose and  Structure of the
Merger", in March 2002, the Majority Stockholder began to explore  preliminarily
the possibility of pursuing a going private transaction.  During that period, he
conducted an analysis as more fully described under  "--Position of the Majority
Stockholder  Regarding  Fairness of the  Merger."  Based on that  analysis,  the
Majority Stockholder determined preliminarily that it might be advisable to seek
to effect a transaction  in which the holders of common stock of ISP (other than
shares beneficially owned by the Majority Stockholder) would each receive a cash
payment in exchange for their shares.  In April 2002,  the Majority  Stockholder
retained Simpson Thacher & Bartlett as legal counsel to provide advice regarding
a possible transaction.

     The  Majority  Stockholder   considered  several  transaction   structures,
including  making a direct  offer to ISP's  stockholders  through a cash  tender
offer or  negotiating  with an independent  special  committee of ISP's board of
directors  to effect a merger  with ISP.  During May and early  June  2002,  the
Majority   Stockholder,   with  the  assistance  of  certain  members  of  ISP's
management,  explored  financing  alternatives for a tender offer for the public
shares of ISP and held numerous  discussions with potential lenders to determine
the  viability  of  such a  transaction.  The  Majority  Stockholder  ultimately
concluded  that a merger  structure  would be preferable to a tender offer,  and
during the remainder of June and through July 8, 2002, the Majority  Stockholder
continued  to  explore  the  desirability  of  pursuing  such  a  going  private
transaction by means of a merger.

     On July 8, 2002, the Majority Stockholder decided to proceed with the going
private  proposal  and  delivered  a letter  to the  board of  directors  of ISP
proposing a transaction that would result in the Majority Stockholder  acquiring
beneficial ownership of all of the common stock of ISP not beneficially owned by
him for a cash  purchase  price of $10 per share.  The  closing  price for ISP's
common stock on the New York Stock Exchange on July 8, 2002 was $7.95. Thus, the
price proposed by the Majority  Stockholder  represented a 26% premium over this
closing price on the day before the proposal was announced.



                                       9


     The letter delivered to the board of directors of ISP is set forth below:


                                                                   July 8, 2002

                      International Specialty Products Inc.
                               Board of Directors
                                 1361 Alps Road
                                 Wayne, NJ 07470

Gentlemen:

     The focus of our  interest at ISP has always  been to increase  shareholder
value for all ISP shareholders.  Nonetheless, our efforts have been hampered, at
least in part, by the following:  first,  attracting analyst coverage and public
investors to a Company with a majority  shareholder  and a small public float is
inherently  difficult  and has been made  more so by the  general  stock  market
downturn;  and,  second,  I believe that  investors have not given us sufficient
credit for the not insubstantial  earnings which have in the past been generated
by  the  Company's   investment   portfolio,   notwithstanding  our  outstanding
investment performance over the years.

     As you know,  we have  sought to take steps in the past to address  some of
these  issues.  For  example,  on  several  occasions,   ISP  has  explored  the
possibility  of  offering  additional  common  shares to increase  stock  market
liquidity,  but  concluded  that such offering  would not make  economic  sense.
Alternatively,  believing  that our common stock was  undervalued in the market,
ISP has from  time to time  engaged  in share  repurchases  in order to  enhance
shareholder value. While these repurchases had a compelling  economic rationale,
they inevitably had the adverse effect of further  limiting the liquidity of the
trading market for ISP stock.

     As a result,  ISP has been unable to realize many of the benefits  normally
associated with public ownership.  The following are just two examples:  (1) ISP
has not been able to utilize its common stock as currency for acquisitions;  and
(2) the lack of liquidity  with respect to the Company's  stock has impaired its
ability to use stock options or  equity-based  incentives as a meaningful way to
attract and retain employees.

     Accordingly,  I am  proposing  that  the  Company  be  taken  private  in a
transaction  in which the  shareholders,  other than my  affiliates  and myself,
would receive $10 per share in cash. This price represents an almost 45% premium
over the average price for the prior 30 days.

     I expect that the Board will form a committee of independent  Board members
to evaluate my proposal,  and wish to assure you that I am most  interested,  as
I'm sure you are,  in  providing  for the utmost of  procedural  fairness in the
interests of ISP's minority  shareholders.  In this connection,  we propose that
approval  of any  transaction  require  the vote of a majority  of the  minority
shareholders.  I am willing to meet with you  promptly in order to discuss  this
proposal,  and I would hope that we could move forward expeditiously to consider
this proposed transaction.

                                                  Sincerely,

                                                  /s/ SAMUEL J. HEYMAN

     ISP issued a press release  shortly  after its board of directors  received
the letter  announcing  the  proposal  and the price  suggested  by the Majority
Stockholder.

     After  receiving  the proposal  letter from the Majority  Stockholder,  the
independent  members of ISP's  board of  directors  (Robert  Englander,  Sanford
Kaplan, Burt Manning and Alan M. Meckler) met to discuss an appropriate response
to the proposal.  The independent directors decided to investigate and interview
potential financial and legal advisors.

     During the remainder of July and early August, ISP's independent  directors
held several  conversations  with each other and with ISP's other  directors and
management  concerning  the  foregoing  matters.  In addition,  the  independent
directors  also discussed the possible  composition  of a special  committee and
discussed  with the other  directors  and ISP's  general  counsel,  the possible
compensation and indemnification arrangements that might apply to the members of
such a special committee.  During that period, they also determined that Willkie
Farr & Gallagher should be retained as counsel to the special commit-


                                       10


tee. Among the factors  considered by the  independent  directors in making this
determination  was the fact that  Willkie  Farr & Gallagher  had not  previously
acted as counsel to ISP or the Majority  Stockholder.  The independent directors
met on August 1, 2002 to interview and discuss several  investment banking firms
as potential financial advisors.

     On August 7, 2002, the board of directors of ISP held a telephonic  meeting
for the  purpose  of  appointing  a special  committee  to  evaluate  the merger
proposal.  In  addition to ISP's  directors,  attending  the meeting  were ISP's
general counsel, representatives of Willkie Farr & Gallagher and representatives
of Simpson  Thacher & Bartlett,  counsel to the Majority  Stockholder  and ISPH.
During the meeting, the Majority  Stockholder  confirmed his continuing interest
in acquiring  beneficial ownership of 100% of ISP, briefly summarized his merger
proposal and  acknowledged the  appropriateness  of the appointment of a special
committee of directors who are not members of management or affiliated  with the
Majority Stockholder to negotiate on behalf of ISP's minority stockholders.  The
Majority Stockholder also informed the board of directors that he had no present
intention to sell the shares of ISP common stock  beneficially owned by him. The
board of  directors  then voted to form a special  committee  composed  of three
independent directors,  Robert Englander,  Burt Manning and Alan M. Meckler. The
board authorized the special committee to:

     o    review and evaluate the merger proposal;

     o    negotiate  to the  extent  it  deemed  appropriate  with the  Majority
          Stockholder with respect to the proposal;

     o    determine,  on behalf of the board of directors,  whether the proposed
          transaction  was fair to,  and in the best  interests  of, ISP and the
          holders of ISP's common stock, other than shares beneficially owned by
          the Majority Stockholder;

     o    recommend  what  action,  if  any, should be taken with respect to the
          merger proposal; and

     o    otherwise  exercise the power of the board of directors in  connection
          with the merger proposal.

The board also  determined not to authorize or recommend the merger  proposal in
absence of a favorable recommendation by the special committee.

The board did not  authorize  the special  committee  to solicit the interest of
third-parties  in a potential sale of ISP because the Majority  Stockholder  was
not interested in allowing a sale of the shares he beneficially  owns in ISP. In
addition,  the board determined that each member of the special  committee would
receive $18,000 for his services and  reimbursement  of expenses  related to the
special  committee's  activities,  which compensation and reimbursement would be
payable whether or not the special committee recommended the merger proposal and
whether  or not  any  proposed  transaction  was  consummated.  The  board  also
authorized  ISP to enter  into  indemnity  agreements  with the  members  of the
special  committee and formally  authorized the committee to engage  independent
legal, financial and other advisors selected by the special committee.

     Pursuant  to  indemnity  agreements  dated  August 7,  2002,  ISP agreed to
indemnify Messrs. Englander,  Manning and Meckler for any expenses,  liabilities
and losses relating to their service as members of the special  committee and/or
the board of directors  in  connection  with the  transaction.  These  indemnity
agreements are in addition to the indemnity  available to the special  committee
members pursuant to ISP's amended and restated  certificate of incorporation and
by-laws.

     Following  the board meeting on August 7, 2002,  the special  committee met
with Willkie Farr & Gallagher to further discuss  potential  financial  advisors
and to review the terms of the draft  merger  agreement  received  from  Simpson
Thacher & Bartlett. The special committee authorized Willkie Farr & Gallagher to
commence  negotiations  with the Majority  Stockholder  and his  representatives
regarding  the  terms  of the  merger  agreement.  The  special  committee  also
authorized  Willkie  Farr &  Gallagher  to  commence  negotiations  with  Lehman
Brothers concerning the terms of its possible engagement as financial advisor to
the special committee.  Among the factors considered by the special committee in
its selection of Lehman  Brothers was its  consideration  of past  relationships
between  Lehman   Brothers  and  ISP  and  the  Majority   Stockholder  and  its
determination that Lehman Brothers had not had a material relationship with ISP,
ISPH  or the  Majority  Stockholder  within  the  past  two  years,  nor  had it
previously acted as financial advisor to ISP, ISPH or the Majority Stockholder.

     In August  2002,  Simpson  Thacher & Bartlett  and Willkie Farr & Gallagher
held preliminary discussions regarding the terms of the merger agreement,  other
than the price per share to be paid pursuant to the merger agreement.

     On August 29, 2002, the special committee entered into an engagement letter
with  Lehman  Brothers  to act as the  committee's  financial  advisor  and,  on
September 4, 2002, ISP issued a press release announcing the engagement.

     Over the course of mid- to  late-August,  2002,  Lehman  Brothers  reviewed
financial and other information  provided by ISP,  including ISP's business plan
and other materials.  On September 3, 2002,  members of ISP's senior  management
met with  representatives  of Lehman  Brothers  and Willkie  Farr & Gallagher in
connection with Lehman Brothers' due diligence review


                                       11


of ISP.  ISP's  management  made a formal  presentation  regarding the financial
condition  and  results  of  operations  of ISP's  chemical  business  (which is
conducted  by ISP's  subsidiary,  ISP Chemco Inc.) and also  reviewed  copies of
ISP's capitalization  structure and sales and five-year projections through 2006
of ISP's chemical  business (the "Five-Year  Plan"),  which had been prepared by
ISP's  management  in December 2001 and presented to ISP's board of directors in
April 2002.

     ISP's  management  summarized  ISP's  earnings  forecasts  for the  various
business segments reflected in the Five-Year Plan and also provided a comparison
of the financial performance of those businesses for the first half of 2002 with
its planned first half financial performance as reflected in the Five-Year Plan.
ISP's management informed Lehman Brothers that operating income of $63.0 million
for the first six months of 2002 for the  chemicals  businesses  (excluding  the
investment  activities of ISP's  investment  subsidiary) was $1.4 million higher
than projected. They also reported that better-than-expected results in the fine
chemical business ($4.9 million above projections), the industrial segment ($4.0
million  above  projections)  and  the  minerals  segment  ($4.6  million  above
projections)  had  been  mostly  offset  by   substantially-lower-than-projected
results in ISP's core chemicals business ($12.1 million below projections).  See
"--ISP's  Forecasts" below.  ISP's management  explained to Lehman Brothers that
much of the  better-than-expected  operating  income  for the  industrial,  fine
chemicals and minerals segments resulted from non-recurring  events,  including,
in the case of the industrial  segment,  a significant delay in the opening of a
competing  plant by a major  competitor of ISP. ISP's  management  also informed
Lehman  Brothers  that ISP's core  chemicals  business was facing  substantially
greater pricing  pressure than  management had anticipated  when it had prepared
its Five-Year Plan.

     Based  on  the  first-half  results,  ISP's  management  revised  its  2002
full-year  budget from the Five-Year  Plan and  presented the revised  full-year
2002  projections to Lehman Brothers  during the September 3, 2002 meeting.  The
revised full-year 2002 projections and the original projections reflected in the
Five-Year Plan prepared in December 2001 are set forth under "--ISP's Forecasts"
below.

     ISP's  management  informed  Lehman  Brothers  that,  since the time of the
preparation  of the Five-Year Plan in December  2001,  ISP's  management had not
revised any of its  projections  for any period after calendar year 2002 because
those  revisions  would  ordinarily be made in the fourth  quarter in connection
with ISP's normal  annual  budgeting  process.  Accordingly,  the effects of the
revisions  and  trends  observed  in 2002 with  respect to  individual  business
segments  were not  taken  into  account  in the  projections  contained  in the
Five-Year  Plan for calendar  years 2003 through 2006.  In addition,  management
noted  that the  weakened  performance  in the  core  chemicals  segment,  which
resulted  from  substantial  pricing  pressure from  competitors  and from price
discounts  demanded  by  customers,  was  expected  to  continue  into  2003 and
potentially beyond.

     On September 18, 2002, Lehman Brothers presented the special committee with
a preliminary financial review of the proposed  transaction,  including a review
of ISP's  business  segments,  competitors,  methods of valuation  and financial
projections.  Lehman  Brothers  noted that it had not discussed its  preliminary
financial  analysis  with ISP  management.  Based on these  points,  the special
committee  instructed  Lehman  Brothers to undertake  further steps as it deemed
necessary to complete its analyses,  including  scheduling  additional  meetings
with ISP's  management  to share its  approach  to value and obtain any  further
information management believed relevant to Lehman Brothers' evaluation.

     On  September  20,  2002,  Lehman  Brothers met again with members of ISP's
senior management team to discuss its preliminary  financial analyses (excluding
any preliminary  valuation ranges derived from those analyses).  Also present at
that  meeting  were  representatives  of Willkie  Farr &  Gallagher  and Simpson
Thacher & Bartlett.  During the course of the September 20, 2002 meeting,  Susan
B. Yoss, ISP's Executive Vice President,  Finance and Treasurer, Neal E. Murphy,
ISP's  Senior  Vice  President  and Chief  Financial  Officer,  and  Richard  A.
Weinberg,  ISP's  Executive  Vice  President,  General  Counsel  and  Secretary,
indicated  their  disagreement  with a  number  of  the  assumptions  and  other
parameters   reflected  in  Lehman   Brothers'   preliminary   analysis.   Those
disagreements  included,  among others,  disagreements  as to (1) certain of the
companies  included by Lehman Brothers in ISP's peer group,  (2) the universe of
precedent  transactions  chosen for  purposes  of Lehman  Brothers'  comparative
analyses and (3) the appropriate discount factor and perpetuity growth rates for
purposes of performing a discounted cash flow analysis of ISP. In addition,  Ms.
Yoss and Messrs.  Murphy and Weinberg  noted their  belief that the  substantial
decline in the  performance of the stock market  generally and of the S&P Midcap
Specialty  Chemicals  Index,  in particular,  was not  adequately  factored into
Lehman Brothers'  analysis of ISP's trading price.  Ms. Yoss and Messrs.  Murphy
and Weinberg believed that ISP's stock price would likely be substantially lower
than the closing price  immediately prior to the Majority  Stockholder's  merger
proposal.  Finally,  Messrs.  Murphy and Weinberg and Ms. Yoss  expressed  their
belief that ISP's ability to achieve the results reflected in the Five-Year Plan
was  uncertain  and  that  there  were  greater   downside   risks  than  upside
opportunities in the plan.  Specifically,  they expressed their view that, based
on their preliminary review of developments and operating results since December
2001,  there was  approximately  $5 million to $10 million in risk to  operating
profit relative


                                       12


to the Five-Year Plan in 2003,  with the risk growing in line with sales through
2006.  The  Lehman  Brothers  representatives  indicated  that  while they would
consider  the input  received  at the  meeting,  they were  bound to rely on the
projections  of ISP's  management  for  purposes  of their  financial  analysis.
Accordingly,   Lehman  Brothers  noted  that  if  ISP  management  believed  the
projections  in the  Five-Year  Plan were no longer up to date,  ISP  management
should provide more current projections.

     At a special committee meeting later that day, Lehman Brothers reviewed the
views of ISP's  management  regarding  Lehman  Brothers'  analysis,  focusing on
management's  views on its projections and which  valuation  methods  management
believed to most accurately depict ISP's worth.

     On September  27, 2002,  the special  committee met to discuss the proposed
transaction and to hear a supplemental  presentation from Lehman Brothers. After
much  deliberation  on the methods of valuation  used, the  performance of ISP's
stock in the marketplace and the  projections of ISP's  management,  the special
committee  concluded  that it could not accept the proposed  transaction at that
time.  Following  that  meeting,  representatives  of Willkie  Farr &  Gallagher
communicated  the  special  committee's  views that,  based on Lehman  Brothers'
preliminary financial analysis to date, the special committee would be unable to
recommend the $10 merger proposal at that time.

     On October 3, 2002,  representatives  of Lehman Brothers met again with Mr.
Weinberg  and  Ms.  Yoss  to  further  discuss  their  respective  views  on the
appropriate assumptions and methodologies for conducting a financial analysis of
ISP  and the  pending  merger  proposal.  Also  present  at  that  meeting  were
representatives of Willkie Farr & Gallagher and Simpson Thacher & Bartlett.  Ms.
Yoss and Mr. Weinberg once again expressed their views regarding the assumptions
and  methodologies   underlying  Lehman  Brothers'  valuation   analyses.   They
reiterated  their belief that ISP's ability to achieve the results  reflected in
the Five-Year Plan was highly uncertain and again summarized the trends in ISP's
various  business  segments  that  lead to that  uncertainty.  Furthermore,  Mr.
Weinberg noted that the Majority Stockholder had indicated that, in light of the
severe  market  downturn  since the date of the merger  proposal,  the  Majority
Stockholder was finding it  increasingly  difficult to sustain a merger proposal
at the $10 per share price.  Following  that meeting,  in light of the continued
belief by ISP management that the analyses  performed by Lehman Brothers did not
adequately  reflect  the  uncertainty  inherent in ISP's  financial  outlook and
diminished  prospects  for the company  since the  preparation  of the Five-Year
Plan,  ISP's  management  agreed to provide  Lehman  Brothers  with more current
projections  that would more fully  reflect the impact of business  developments
that  had  occurred  subsequent  to the  preparation  of the  Five-Year  Plan in
December 2001.

     On October 10, 2002,  Lehman  Brothers met with ISP's  management  team and
other ISP  personnel at ISP, at which time ISP's  management  presented  updated
five-year projections (the "Updated Projections") to Lehman Brothers,  including
those set forth under "--ISP's  Forecasts"  below.  ISP's management  provided a
detailed presentation regarding the manner in which the Updated Projections were
prepared and the factors and developments leading to the differences between the
Updated  Projections  and the  projections  reflected in the Five-Year  Plan and
answered  questions  regarding the Updated  Projections.  In  particular,  ISP's
management  explained  that,  while the revised  2002  projections  presented on
September  3,  2002  were  substantially   accurate,  the  projections  for  the
subsequent  four years had not been updated for  developments in the business of
ISP, the specialty  chemicals  industry and the economy generally since December
2001. ISP's management  advised the special  committee that as a result of these
changes,  the Updated  Projections  replaced the Five-Year Plan as  management's
best  currently  available  estimates and  judgments as to the future  financial
performance  of ISP.  The  Updated  Projections  were based on  several  changed
factors,  including  pricing  pressures  in  the  personal  care  and  specialty
chemicals  segments,  softness  of  demand in  growth  markets  such as Asia and
contemplated changes in the pricing terms of a major supply contract.

     On October 21, 2002, the special committee met with members of ISP's senior
management  and the Majority  Stockholder  to discuss,  among other things,  the
Updated  Projections  and to  continue  its  discussions  regarding  the  merger
proposal.  Also present at that meeting were representatives from Willkie Farr &
Gallagher,  Simpson  Thacher & Bartlett and Lehman  Brothers.  After  presenting
information  concerning the Updated Projections to the special committee,  ISP's
management and the Majority  Stockholder answered questions posed by the special
committee members and representatives from Lehman Brothers.

     After ISP's management,  the Majority  Stockholder and representatives from
Simpson Thacher & Bartlett left the meeting, Lehman Brothers gave a presentation
to the  special  committee  on a  financial  analysis  of the offer based on the
Updated  Projections.  The  special  committee,  after  considerable  discussion
regarding  the Updated  Projections,  concluded  that it could not recommend the
merger  proposal at $10 per share.  Following the October 21, 2002 meeting,  the
special  committee's legal advisor and the Majority  Stockholder's legal advisor
had numerous  conversations  regarding the parties'  respective views concerning
the appropriate  per share price in the merger.  The special  committee's  legal
advisor  indicated that the special  committee was not prepared to recommend the
merger at the $10 per share price and, accordingly, sought to negotiate a higher
price per share.


                                       13


     The  Majority   Stockholder   continued  to  believe  the  proposed  merger
consideration  was fair and,  accordingly,  instructed  his legal advisors that,
while he was  willing to  explore  non-price  contractual  changes to the merger
agreement and a possible settlement of the pending stockholder  litigation,  the
Majority   Stockholder   would  not   authorize   an   increase  in  the  merger
consideration.  Furthermore, the Majority Stockholder's representatives informed
the special committee's legal advisors that the Majority  Stockholder  continued
to be concerned  about the  advisability  of sustaining  the merger  proposal in
light  of  the   deterioration  in  market  conditions  and  that  the  Majority
Stockholder  might  consider  withdrawing  the merger  proposal  if the  special
committee  concluded it could not recommend the proposed  transaction at $10 per
share.  On October 25,  2002,  counsel  for the  Majority  Stockholder  met with
plaintiffs'  counsel in the  stockholder  litigation  in  Delaware  to discuss a
potential  settlement of the  litigation.  Counsel for the Majority  Stockholder
also  attempted to include  plaintiffs'  counsel in the  stockholder  litigation
pending  in New  Jersey  in the  settlement  discussions.  In  light of the firm
position of the special committee, on October 30, 2002, the Majority Stockholder
authorized  his legal  advisors to explore  with the special  committee's  legal
advisors a possible  increase in the per share merger  consideration  to $10.25,
subject to the prompt  negotiation of a mutually  acceptable  merger  agreement,
approval of the agreement by the entire special  committee and settlement of the
stockholder litigation.

     On October 30, 2002, in a meeting of the special committee, representatives
of  Willkie  Farr  &  Gallagher   reported   that  the  Majority   Stockholder's
representatives had advised them that the Majority  Stockholder would be willing
to increase the per share merger  consideration to $10.25,  subject to the above
conditions.  The special committee  discussed whether to accept $10.25 per share
but  ultimately  instructed  Willkie  Farr &  Gallagher  to advise the  Majority
Stockholder's  representatives  that the special committee was not in a position
to  recommend  the  proposed  transaction  at $10.25 at that time,  and  further
instructed  Willkie  Farr &  Gallagher  to propose an offer  price of $10.50 per
share.

     On October 31, 2002, the special  committee's  legal advisors  conveyed the
special  committee's  views to the Majority  Stockholder's  legal  advisors.  In
response,  the  Majority  Stockholder's   representatives  advised  the  special
committee's legal advisors that the Majority  Stockholder would not increase the
merger consideration to $10.50 and that if prompt agreement could not be reached
by the parties at a merger price of $10.25 per share,  the Majority  Stockholder
would consider withdrawing his offer.

     On November 1, 2002, the special committee met, along with  representatives
of Willkie Farr & Gallagher and Lehman  Brothers to further discuss the proposed
transaction.

     On November 4, 2002, the Majority Stockholder authorized his legal advisors
to  indicate  his  potential  willingness  to  increase  the  per  share  merger
consideration  to $10.30  per  share.  In a meeting  on that  day,  the  special
committee discussed the fairness of the proposal to ISP's minority  stockholders
and  agreed to reject  the  proposal  of $10.30  per  share,  but to inform  the
Majority  Stockholder's  representative  that, while it was not in a position to
recommend  the proposed  transaction  at $10.30 per share at that time, it would
consider   recommending   the  proposal  at  $10.35  per  share.   The  Majority
Stockholder's  representative  stated that the  Majority  Stockholder  would not
accept that share price,  and that if the special  committee could not recommend
the proposed transaction at $10.30 per share that the Majority Stockholder would
withdraw the offer.

     The  special  committee  evaluated  the  possibility  of  turning  down the
proposed merger  consideration but was concerned that such decision might result
in the minority stockholders losing the opportunity to receive $10.30 per share.
If the  Majority  Stockholder  were to  withdraw  the offer,  the price of ISP's
publicly-traded  stock would likely fall significantly from its closing price of
$9.40 on  November  1,  2002.  The  special  committee  noted that the market in
general or the specialty chemical sector could deteriorate further, lowering the
market  price of the  shares.  The  special  committee  also  considered  Lehman
Brothers' preliminary financial analysis and the special committee's view of the
likelihood  that  Lehman  Brothers  would be in a  position  to issue a fairness
opinion  with  respect to a proposal of $10.30 per share.  Finally,  the special
committee  noted  that it was  unlikely  that a third  party  would  attempt  to
purchase  ISP  stock  held  by  minority   stockholders   due  to  the  Majority
Stockholder's substantial beneficial ownership interest in ISP.

     Between  November 4 and November 6, the parties' legal  advisors  completed
negotiations of the open  contractual  terms in the merger  agreement and voting
agreement.

     Settlement  discussions  between  counsel for the Majority  Stockholder and
plaintiffs'  counsel in the pending  stockholder  litigation in Delaware and New
Jersey also continued during this period.

     On November  6, 2002,  the special  committee  met to discuss the  Majority
Stockholder's response to the special committee's attempts to increase the offer
price of $10.30 per share. Lehman Brothers presented a financial analysis of the
offer and orally  delivered its opinion,  which it committed to deliver later in
writing,  that,  as of that date and based upon and subject to the  assumptions,
limitations  and  qualifications  set  forth  in the  Lehman  Brothers'  written
opinion, the proposed transaction at $10.30 per share was fair, from a financial
point of view, to ISP's stockholders,  other than holders of shares beneficially
owned by


                                       14


the Majority Stockholder.  Ultimately,  the special committee concluded that the
opportunity  to  receive  $10.30  cash per share  should be  presented  to ISP's
stockholders.  In reaching that conclusion, the special committee noted that the
adoption of the merger agreement at that price would be subject to acceptance by
a  majority  of the  minority  stockholders  voting at the  special  meeting  to
consider approval of the merger.  After further  discussion and deliberation and
taking into  account  all of the  factors  noted  above,  the special  committee
unanimously (1) concluded that the proposed  transaction was fair to, and in the
best  interests  of,  the  stockholders  of ISP,  other  than  holders of shares
beneficially owned by the Majority Stockholder, and (2) agreed to recommend that
our board approve the terms of the proposed transaction. Later that day, Willkie
Farr & Gallagher reported the special committee's decision to ISP.

     On November 7, the parties announced that the Majority  Stockholder and the
special committee had reached an agreement with respect to the merger at a price
of $10.30 per share in cash, subject to approval by ISP's board of directors.

     On November  8, 2002,  the special  committee  met to approve the  proposed
resolutions,  which (1) concluded  that the proposed  transaction  at $10.30 per
share was fair to, and in the best interests of, the  stockholders of ISP, other
than holders of shares beneficially owned by the Majority  Stockholder,  and (2)
recommended that the full board approve the terms of the proposed transaction.

     Later that day,  our board of  directors  met and,  based on the  unanimous
recommendation of the special committee,  the board determined that the proposed
merger was fair to, and in the best interests of, ISP's stockholders, other than
holders of shares  beneficially  owned by the  Majority  Stockholder.  The board
voted unanimously (with the Majority  Stockholder and Sunil Kumar abstaining) to
approve the merger and voting  agreements and recommend that ISP's  stockholders
adopt the merger agreement.

     Following   settlement   discussions   between  counsel  for  the  Majority
Stockholder   and  counsel  for  plaintiffs  in  the  Delaware  and  New  Jersey
litigations,  on November 19, 2002,  the parties to the  stockholder  litigation
pending in Delaware  agreed on and executed a  memorandum  of  understanding  to
reflect a proposed  settlement  of the  Delaware  litigation.  The parties  also
agreed,  subject to various  conditions,  to enter into a settlement  agreement,
cooperate in public  disclosures  related to the settlement and use best efforts
to gain approval of the settlement by the Delaware courts. Without any admission
of fault by the  defendants,  the  memorandum of  understanding  contemplates  a
dismissal of all claims with  prejudice and a release in favor of all defendants
of any and all claims  related  to the merger  that have been or could have been
asserted by the plaintiffs or any members of the purported class  (including the
pending  claims in the New Jersey  litigation).  The  settlement  is subject to,
among other  factors,  completion  of  confirmatory  discovery,  execution  of a
settlement  agreement and final approval of the settlement by the Delaware Court
of Chancery and completion of the merger.

RECOMMENDATIONS OF THE SPECIAL COMMITTEE AND OUR BOARD OF DIRECTORS

     The special  committee has  unanimously  determined that the merger and the
merger  agreement are fair to and in the best interests of the  stockholders  of
ISP, other than the Majority  Stockholder  and his  affiliates,  and unanimously
determined to recommend to our board of directors that the board of directors:

     o    approve and adopt the merger agreement and the voting agreement;

     o    declare the advisability of the merger agreement; and

     o    recommend  that the  stockholders  of ISP approve and adopt the merger
          agreement.

     Based  on the  unanimous  recommendation  of the  special  committee,  by a
unanimous  vote of the directors  (other than the Majority  Stockholder  and Mr.
Kumar, who abstained), our board of directors has:

     o    approved and adopted the merger agreement and the voting agreement;

     o    declared the  advisability of the merger agreement and the fairness of
          the merger; and

     o    recommended  that the stockholders of ISP approve and adopt the merger
          agreement.


                                       15


SPECIAL COMMITTEE'S POSITION AS TO FAIRNESS OF THE MERGER

     In  reaching  the  conclusions   described  above,  the  special  committee
considered a number of factors,  including the following factors, each of which,
in the special committee's judgment supported its conclusion as to fairness:

     o    the  proposed  merger in which the  stockholders  of ISP,  other  than
          holders  of  common   stock   beneficially   owned  by  the   Majority
          Stockholder,  except shares held by qualified charitable organizations
          (which   will  be   converted   into  the  $10.30  per  share   merger
          consideration),  would be entitled to receive $10.30 cash per share as
          merger consideration;

     o    the  opinion of Lehman  Brothers,  a copy of which is attached to this
          proxy  statement  as Annex B, that,  as of the date of the opinion and
          based  upon  and   subject  to  the   assumptions,   limitations   and
          qualifications set forth in that opinion,  the merger consideration is
          fair,  from a financial  point of view,  to the  stockholders  of ISP,
          other than the Majority Stockholder and his affiliates;

     o    the presentations of Lehman Brothers  regarding its financial analyses
          of the proposed  merger.  See  "--Background  of the Merger" above and
          "--Opinion of Lehman Brothers" below;

     o    while not required by the Delaware  General  Corporation  Law or ISP's
          amended and restated  certificate  of  incorporation  or by-laws,  the
          merger is  conditioned  upon the  satisfaction  of the majority of the
          minority condition;

     o    that the terms and conditions of the proposed  merger were  determined
          through  arm's-length  negotiations with the Majority  Stockholder and
          his representatives by the special committee and its advisors,  all of
          whom are unaffiliated with the Majority Stockholder;

     o    the  inability  to  initiate  interest  in the  minority  shares  by a
          potential  third  party  bidder  due  to  the  Majority  Stockholder's
          majority  beneficial  ownership  interest  in  ISP  and  the  Majority
          Stockholder's  unwillingness  to sell the  entire  company  to a third
          party bidder;

     o    current economic, industry and market conditions affecting ISP;

     o    the  provisions  of the merger and voting  agreements,  including  the
          majority of minority condition; and

     o    that  stockholders  who do not waive their appraisal  rights will have
          the opportunity in connection  with the merger to demand  appraisal of
          the fair value of their shares under the Delaware General  Corporation
          Law.

The special  committee  also  considered  the known and  possible  conflicts  of
interest of certain  directors and executive  officers of ISP discussed below in
"--Interests of the Directors and Executive Officers in the Merger."

MAJORITY STOCKHOLDER AND ISPH'S POSITIONS AS TO THE FAIRNESS OF THE MERGER

     The rules of the  Securities and Exchange  Commission  require the Majority
Stockholder and ISPH to express their belief as to the fairness of the merger to
the holders of ISP common  stock,  other than the Majority  Stockholder  and his
affiliates.  The  Majority  Stockholder  and ISPH  believe  that the  merger  is
substantively  and procedurally  fair to the holders of ISP common stock,  other
than the Majority Stockholder and his affiliates.  However, neither the Majority
Stockholder nor ISPH has performed,  or engaged a financial  advisor to perform,
any valuation  analysis for the purposes of assessing the fairness of the merger
to holders of ISP common  stock  (other than the  Majority  Stockholder  and his
affiliates). Moreover, neither the Majority Stockholder nor ISPH participated in
the  deliberations of the special  committee or received advice from the special
committee's financial advisor.

     The Majority Stockholder and ISPH's belief that the merger is substantively
fair to holders of ISP common stock (other than the Majority Stockholder and his
affiliates) is based on the following factors:

     o    the conclusion and  recommendation  of the special  committee that the
          merger is fair to,  and in the best  interests  of,  holders of common
          stock, other than the Majority Stockholder and his affiliates;

     o    the  receipt by the  special  committee  of the  opinion  from  Lehman
          Brothers as to the  fairness,  from a financial  point of view, of the
          $10.30 per share cash merger consideration;

     o    the  consideration  to be paid in the merger  represents  a nearly 30%
          premium over the reported closing price of ISP common stock on the New
          York Stock Exchange on the last trading day prior to the  announcement
          of the Majority  Stockholder's  proposal on July 8, 2002, and nearly a
          49% premium  over the average  closing  price for the 30 days prior to
          the announcement of the proposal;


                                       16


     o    the  S&P  500  Index  and the S&P  Midcap  Specialty  Chemicals  Index
          declined 5.5% and 9.3%,  respectively,  during the period from July 8,
          2002 through November 6, 2002, the date on which the special committee
          agreed to recommend the merger agreement,  thereby indicating that the
          premium of the merger consideration over the unaffected share price of
          ISP (i.e.,  the market price that would likely be in effect in absence
          of the merger proposal) would likely have been higher than the premium
          referred to above;

     o    the merger will provide  consideration to ISP's stockholders  entirely
          in cash and is not subject to any financing condition;

     o    the merger would shift the risk of the future financial performance of
          ISP from the public stockholders, who do not have the power to control
          decisions  made  as  to  ISP's  business,  entirely  to  the  Majority
          Stockholder, who has the power to control ISP's business; and

     o    the  Majority  Stockholder  currently  intends to retain his  majority
          holdings  in  ISP,  which  forecloses  any  near-term  opportunity  to
          consider an alternative  transaction  with a third party  purchaser of
          ISP  or   otherwise   provide   increased   liquidity  to  the  public
          stockholders.  Accordingly,  it is unlikely that finding a third party
          purchaser for ISP is a realistic option for the public stockholders in
          the near future.

     The Majority  Stockholder and ISPH's belief that the merger is procedurally
fair to holders of ISP common stock is based on the following factors:

     o    the merger and the terms and  conditions of the merger  agreement were
          the  result of  arm's-length,  good  faith  negotiations  between  the
          special  committee and the Majority  Stockholder and their  respective
          advisors and representatives;

     o    the  special  committee   retained  Lehman  Brothers,   which  is  not
          affiliated with the Majority Stockholder or ISPH management,  to serve
          as its  independent  financial  advisor,  and  the  special  committee
          received  an  opinion  from  Lehman   Brothers  on  November  6,  2002
          (subsequently  confirmed in writing on November 8, 2002) to the effect
          that as of such date and, based upon and subject to, the  assumptions,
          limitations and qualifications  set forth in its written opinion,  the
          $10.30  in  cash  per  share  merger  consideration  was  fair  from a
          financial point of view to ISP's stockholders (other than the Majority
          Stockholder and his affiliates);

     o    the merger was  unanimously  approved by all members of ISP's board of
          directors,  other than the Majority Stockholder and Mr. Kumar (each of
          whom abstained because they are also directors of ISPH); and

     o    the fact  that  stockholders  who do not  vote in favor of the  merger
          would be  entitled,  subject to  compliance  with  certain  procedures
          described under "The  Merger--Appraisal  Rights", to exercise Delaware
          statutory appraisal rights,  which allow stockholders to have the fair
          value of their shares determined by the Delaware Court of Chancery and
          paid to them in cash.

     The Majority  Stockholder and ISPH considered each of the foregoing factors
to support their  determinations  as to the fairness of the merger.  Neither the
Majority  Stockholder  nor ISPH found it  practicable  to  assign,  nor did they
assign,  relative weights to the individual factors considered in reaching their
conclusion as to fairness. The liquidation of ISP's assets was not considered to
be a viable course of action based on the Majority  Stockholder's desire for ISP
to continue as an ongoing business concern. Also, substantial value results from
continuing ISP as a going-concern  and any liquidation would destroy that value.
Therefore,  no appraisal of liquidation value was sought for purposes of valuing
the  shares of ISP  common  stock.  The  Majority  Stockholder  and ISPH did not
consider  ISP's book value to be meaningful in evaluating  the offer price given
the nature of ISP's  business.  The Majority  Stockholder  and ISPH believe that
book  value is a  valuation  methodology  more  typically  used in the  banking,
utilities, real estate and financial services industries.

     Neither the Majority Stockholder nor ISPH is aware of any offer made during
the last two years to acquire ISP,  thus no  comparison  of the $10.30 per share
merger consideration could be made to any other comparable offer.

     The foregoing  discussion of the  information  and factors  considered  and
given  weight  by the  Majority  Stockholder  and  ISPH  is not  intended  to be
exhaustive,  but is believed to include all material  factors  considered by the
Majority  Stockholder and ISPH. The view of the Majority Stockholder and ISPH as
to the fairness of the merger is not a  recommendation  to any stockholder as to
how that stockholder should vote on the merger.


                                       17


OPINION OF LEHMAN BROTHERS

     In August 2002, the special committee engaged Lehman Brothers to act as its
financial  advisor  with  respect  to the  Majority  Stockholder's  July 8, 2002
proposal to acquire the remaining shares of ISP not already  beneficially  owned
by him and his affiliates.  On November 6, 2002,  Lehman  Brothers  rendered its
oral  opinion  (subsequently  confirmed  in writing on  November 8, 2002) to the
special  committee  that as of that  date  and  based  upon and  subject  to the
assumptions,  limitations  and  qualifications  set forth in that  opinion,  the
consideration  offered in the merger to the  stockholders  of ISP other than the
Majority Stockholder and his affiliates is fair, from a financial point of view,
to those stockholders.

     THE FULL TEXT OF LEHMAN BROTHERS' WRITTEN OPINION DATED NOVEMBER 8, 2002 IS
ATTACHED  AS ANNEX B TO THIS  PROXY  STATEMENT.  STOCKHOLDERS  SHOULD  READ THAT
OPINION FOR A DISCUSSION OF THE ASSUMPTIONS MADE,  PROCEDURES FOLLOWED,  FACTORS
CONSIDERED  AND  LIMITATIONS  UPON THE REVIEW  UNDERTAKEN BY LEHMAN  BROTHERS IN
RENDERING  ITS  OPINION.  THE  FOLLOWING  IS A SUMMARY OF THAT  OPINION  AND THE
METHODOLOGY THAT LEHMAN BROTHERS USED TO RENDER ITS FAIRNESS OPINION.

     Lehman  Brothers'  advisory  services  and Lehman  Brothers'  opinion  were
provided  for  the  information  and  assistance  of the  special  committee  in
connection with its consideration of the merger agreement and the merger. Lehman
Brothers' opinion is not intended to be and does not constitute a recommendation
to any stockholder of ISP as to how such stockholder should vote with respect to
the merger.  Lehman  Brothers was not  requested to opine as to, and its opinion
does not address,  ISP's underlying  business decision to proceed with or effect
the merger.

     In arriving at its opinion, Lehman Brothers reviewed and analyzed:

     o    the merger agreement and the specific terms of the merger;

     o    publicly  available  information  concerning ISP that Lehman  Brothers
          believed to be relevant to its analysis, including ISP's annual report
          on Form 10-K for the  fiscal  year  ended  December  31,  2001,  ISP's
          quarterly  reports on Form 10-Q for the  quarters  ended  March 31 and
          June 30, 2002,  and the amended  Schedule  13D filed by Mr.  Heyman on
          July 9, 2002;

     o    financial  and  operating  information  with respect to the  business,
          operations  and prospects of ISP furnished to Lehman  Brothers by ISP,
          including,  without limitation,  the Five-Year Plan provided to Lehman
          Brothers on September 3, 2002 and the Updated Projections  provided to
          Lehman Brothers and the special  committee on October 21, 2002,  which
          were updated and lower projections of future financial  performance of
          ISP prepared by management of ISP;

     o    a trading history of ISP's common stock from June 25, 1991 to November
          4, 2002 and a comparison  of that trading  history with those of other
          companies that Lehman Brothers deemed relevant;

     o    a comparison of the historical financial results and present financial
          condition of ISP with those of other  companies  that Lehman  Brothers
          deemed relevant; and

     o    a comparison of the  financial  terms of the merger with the financial
          terms of certain other recent transactions that Lehman Brothers deemed
          relevant.

In  addition,  Lehman  Brothers  had  discussions  with  the  management  of ISP
concerning its business,  operations,  assets, financial condition and prospects
and undertook such other studies, analyses and investigations as Lehman Brothers
deemed appropriate.

     In arriving at its  opinion,  Lehman  Brothers  assumed and relied upon the
accuracy and completeness of the financial and other  information used by Lehman
Brothers without  assuming any  responsibility  for independent  verification of
that  information  and further  relied upon the  assurances of management of ISP
that  they were not aware of any facts or  circumstances  that  would  make that
information inaccurate or misleading.  With respect to the financial projections
of ISP,  Lehman  Brothers was advised by ISP that the Updated  Projections  were
reasonably prepared on a basis reflecting the best currently available estimates
and judgments of the management of ISP as to the future financial performance of
ISP  and,   accordingly,   Lehman  Brothers   assumed  that  ISP  would  perform
substantially in accordance with those projections. Furthermore, Lehman Brothers
discussed  the Updated  Projections  with the  management of ISP and the special
committee,  and it was agreed that the Updated  Projections were the appropriate
projections to use in performing Lehman Brothers' analysis.

     In  arriving at its  opinion,  Lehman  Brothers  did not conduct a physical
inspection of the  properties  and  facilities of ISP and did not make or obtain
any  evaluations or appraisals of the assets or liabilities of ISP. In addition,
the special  committee did not authorize Lehman Brothers to solicit,  and Lehman
Brothers did not solicit,  any indications of interest from any third party with
respect to the purchase of all or a part of ISP's business.  Furthermore,  based
on advice of the management of ISP, Lehman



                                       18


Brothers  understood that the Majority  Stockholder does not currently intend to
sell his interest in ISP (other than as  permitted  pursuant to the terms of the
voting  agreement  between the  Majority  Stockholder  and ISP) or to solicit or
entertain any proposals  from third  parties for the  acquisition  of ISP as, or
substantially  as, an entirety.  Lehman Brothers'  opinion was necessarily based
upon  market,  economic  and other  conditions  as they existed on, and could be
evaluated as of, the date of the opinion.

     In connection with rendering its opinion, Lehman Brothers performed certain
financial, comparative and other analyses as described below. The preparation of
a fairness opinion involves  various  determinations  as to the most appropriate
and relevant  methods of financial and comparative  analysis and the application
of those methods to the particular circumstances,  and therefore, is not readily
susceptible  to summary  description.  Furthermore,  in arriving at its opinion,
Lehman  Brothers  considered  the  results  of all of its  analyses  and did not
attribute  any  particular  weight to any analysis or factor  considered  by it.
Accordingly,  Lehman Brothers believes that its analyses must be considered as a
whole and that  considering  any portion of those analyses and factors,  without
considering  all analyses and factors as a whole,  could create a misleading  or
incomplete view of the process underlying its opinion.

     In its analyses,  Lehman Brothers made numerous assumptions with respect to
industry  performance,  general  business  and  economic  conditions  and  other
matters,  many of which are  beyond  the  control  of ISP.  None of ISP,  Lehman
Brothers  or any other  person  assumes  responsibility  if future  results  are
materially  different  from those  discussed.  Any estimates  contained in these
analyses are not necessarily indicative of actual values or predictive of future
results or values, which may be significantly more or less favorable than as set
forth  in  the  estimates.  In  addition,  analyses  relating  to the  value  of
businesses  do not  purport to be  appraisals  or to reflect the prices at which
businesses actually may be sold.

     The  following  is a summary of the  material  financial  analyses  used by
Lehman  Brothers  in  connection  with  providing  its  opinion  to the  special
committee.  In  arriving  at its  opinion,  Lehman  Brothers  did not  ascribe a
specific  range of value to ISP,  but rather  made its  determination  as to the
fairness, from a financial point of view, to the stockholders of ISP (other than
the Majority  Stockholder  and his affiliates) of the  consideration  offered to
such  stockholders  in the merger on the basis of the financial and  comparative
analyses described below. Certain of the summaries of financial analyses include
information  presented  in  tabular  format.  In order to fully  understand  the
financial  analyses  used by Lehman  Brothers,  the tables must be read together
with the text of each  summary.  The tables  alone do not  constitute a complete
description of the financial analyses.  Accordingly,  the analyses listed in the
tables  and  described  below must be  considered  as a whole.  Considering  any
portion of those analyses and of the factors considered, without considering all
analyses  and  factors,  could create a  misleading  or  incomplete  view of the
process underlying Lehman Brothers' opinion.

     STOCK TRADING HISTORY

     Lehman  Brothers  considered  historical  data with  regard to the  trading
prices of ISP common stock for the period from June 25, 1991 to November 4, 2002
and the relative stock price  performances  during this same period for ISP, the
Lehman Brothers  Specialty  Chemicals Index, or LBSCI, and the Standard & Poor's
500 Index.  During the year prior to  announcement  of Mr. Heyman's July 8, 2002
cash  proposal of $10.00 per share,  the closing  stock price of ISP ranged from
$5.60 to $11.11 per share.  Over this  approximate  one-year  period,  ISP stock
provided a negative return of 25.4%,  while the LBSCI provided a negative return
of  18.5%  and the S&P 500  Index  provided  a return  of  11.5%.  As such,  ISP
underperformed the LBSCI over this period by 6.9% and underperformed the S&P 500
Index over this period by 36.9%.  During the year prior to November 4, 2002, the
closing stock price of ISP ranged from $5.60 to $10.45 per share.  The following
table  summarizes the  historical  prices one year prior to November 4, 2002 and
one year prior to the announcement,  as well as the corresponding premium of the
merger consideration to each of these price statistics:




                                               PRIOR TO NOVEMBER 4, 2002               PRIOR TO JULY 8, 2002 ANNOUNCEMENT(1)
                                          ----------------------------------             ----------------------------------
                                          ISP PRICE               % PREMIUM              ISP PRICE               % PREMIUM
                                          ---------               ---------              ---------               ---------
                                                                                                        
Merger Consideration                        $10.30                   NA                    $10.30                   NA
1 Day                                         9.20                   12.0%                   7.95                   29.6%
7 Days Avg.                                   9.16                   12.5%                   7.82                   31.7%
30 Days Avg.                                  9.26                   11.2%                   6.92                   48.8%
60 Days Avg.                                  9.44                    9.2%                   7.70                   33.7%
90 Days Avg.                                  9.59                    7.4%                   8.32                   23.8%
180 Days Avg.                                 9.03                   14.0%                   8.61                   19.7%
1 Year Avg.                                   8.98                   14.7%                   8.85                   16.4%
1 Year Median                                 9.17                   12.3%                   8.80                   17.0%


                           (TABLE CONT'D ON NEXT PAGE)



                                       19




                                           PRIOR TO NOVEMBER 4, 2002                 PRIOR TO JULY 8, 2002 ANNOUNCEMENT(1)
                                     ----------------------------------             ----------------------------------
                                           ISP PRICE               % PREMIUM              ISP PRICE               % PREMIUM
                                           ---------               ---------              ---------               ---------
                                                                                                        
1 Year High                                  10.45                   (1.4%)                 11.11                   (7.3%)
1 Year Low                                    5.60                   83.9%                   5.60                   83.9%



--------------------
(1) The "1 Day" trading date prior to announcement was July 8, 2002.

     COMPARABLE TRADING ANALYSIS

     In order to assess how the public market  values shares of  non-controlled,
fully   distributed   publicly   traded   companies   with   similar   operating
characteristics as ISP, Lehman Brothers reviewed and compared specific financial
and operating data relating to ISP with selected  companies that Lehman Brothers
deemed comparable to ISP, including:

     o   Albemarle Corp.,

     o   Arch Chemicals Inc.,

     o   Cambrex Corp.,

     o   Croda International PLC,

     o   Cytec Industries Inc.,

     o   Great Lakes Chemical Corp.,

     o   International Flavors & Fragrances Inc.,

     o   Penford Corp., and

     o   Sensient Technologies Corp.

     Using  publicly  available  information,  Lehman  Brothers  calculated  and
analyzed each  company's  enterprise  value  relative to certain  historical and
projected  financial  criteria such as sales,  earnings before interest,  taxes,
depreciation  and  amortization  (EBITDA) and earnings before interest and taxes
(EBIT).  The  enterprise  value of each  company  was  obtained  by  adding  its
short-term  and  long-term  debt to the sum of the  market  value of its  common
equity,  the value of any preferred  stock (at  liquidation  value) and the book
value of any minority  interest,  and subtracting its cash and cash equivalents.
The analysis indicated the following multiples as of November 4, 2002:



                                                              COMPARABLE COMPANIES
                                           --------------------------------------------------------                 ISP AT
                                             HIGH                    MEAN                    LOW                 TRANSACTION
                                           ---------               ---------              ---------              -----------
                                                                                                         
Enterprise Value as a Multiple of:
  LTM(1) Sales                               2.36x                   1.38x                  0.66x                   1.38x
  2002E Sales                                2.37x                   1.35x                  0.85x                   1.35x
  2003E Sales                                2.31x                   1.27x                  0.85x                   1.35x

  LTM EBITDA                                 12.8x                    7.6x                   5.6x                    6.8x
  2002E EBITDA                               10.2x                    7.3x                   5.4x                    6.7x
  2003E EBITDA                                9.4x                    6.8x                   5.2x                    6.9x

  LTM EBIT                                   43.6x                   12.1x                  10.3x                   10.2x
  2002E EBIT                                 14.7x                   11.7x                  10.8x                   10.1x
  2003E EBIT                                 12.0x                   10.5x                  10.2x                   10.6x



---------------
(1)  LTM means the latest  twelve  months  ending  June 30, 2002 for ISP and for
     other comparable  companies except as of May 31, 2002 for Penford Corp. and
     as of December 31, 2001 for Croda International PLC.

     Due to the  inherent  differences  between  the  business,  operations  and
prospects of ISP and the  business,  operations  and  prospects of the companies
included in the  comparable  companies,  Lehman  Brothers  believed  that it was
inappropriate to, and therefore did not, rely solely on the quantitative results
of the  comparable  trading  analysis  and  accordingly  also  made  qualitative
judgments   concerning   differences   between  the   financial   and  operating
characteristics  and  prospects  of  ISP  and  the  companies  included  in  the
comparable trading analysis that would affect the public trading values of each.
Accordingly,  using the mean  multiples  as a  general  guide,  Lehman  Brothers
selected certain multiples that it believed reflected the theoretical trad-


                                       20


ing multiples  for  ISP on a  non-controlled,   fully  distributed  basis. Based
on those multiples,  this analysis  indicated a range of equity values per share
of $10.07 to $12.67.  Lehman  Brothers  noted that the merger  consideration  of
$10.30 per share falls within this range.

     INDUSTRY TRANSACTION ANALYSIS

     Using publicly available information, Lehman Brothers reviewed and compared
the purchase  prices and multiples  paid in 11  acquisitions  of companies  that
Lehman  Brothers deemed  relevant to arriving at its opinion.  The  transactions
that Lehman Brothers considered relevant in assessing the merger included:

     o    Acquisition of Roche Vitamins and Fine Chemicals by DSM NV,

     o    Acquisition  of Haarmann & Reimer  (Bayer AG) by EQT  Northern  Europe
          Private Equity Fund,

     o    Acquisition of Cognis BV (Henkel KGaA) by an Investor Group,

     o    Acquisition of Ascot PLC by Dow Chemical Co.,

     o    Acquisition of Laporte PLC by Degussa AG,

     o    Acquisition of BF Goodrich Performance Materials by AEA Investors,

     o    Acquisition of Catalytica Pharmaceuticals (Catalytica Inc.) by DSM NV,

     o    Acquisition of Hickson International PLC by Arch Chemicals Inc.,

     o    Acquisition of Witco Corp. by Crompton & Knowles Corp.,

     o    Acquisition  of Zeneca  Specialties  (Astra  Zeneca PLC) by Cinven and
          Investcorp, and

     o    Acquisition of Bio Whittaker Inc. by Cambrex Corp.

     Lehman  Brothers  considered  the  transaction  values as  multiples of LTM
sales,  EBITDA and EBIT for the four fiscal quarters  immediately  preceding the
announcement  of  each  applicable  transaction.   The  analysis  indicated  the
following multiples:



                                                         COMPARABLE TRANSACTIONS
                                     ---------------------------------------------------------------               ISP AT
                                             HIGH                    MEAN                    LOW                  TRANSACTION
                                           ---------              ---------               ---------              -----------
                                                                                                        
Transaction Value as a Multiple of:
  LTM Sales                                  2.64x                   1.57x                  0.59x                   1.38x
  LTM EBITDA                                 10.5x                    8.6x                   6.4x                    6.8x
  LTM EBIT                                   17.4x                   14.0x                  10.3x                   10.2x


     Because  the  reasons  for and the  circumstances  surrounding  each of the
transactions analyzed were so diverse and because of the inherent differences in
the businesses,  operations,  financial conditions and prospects of ISP, and the
businesses,  operations,  and financial  conditions of the companies included in
the  industry  transactions  group,  Lehman  Brothers  believed  that  a  purely
quantitative   comparable   transaction   analysis  would  not  be  particularly
meaningful  in the  context of the merger.  Lehman  Brothers  believed  that the
appropriate use of an industry  transaction  analysis in this instance  involves
qualitative  judgments concerning the differences between the characteristics of
these  transactions and the merger which would affect the acquisition  values of
the acquired  companies  and ISP.  Lehman  Brothers also noted that the industry
transactions  all involved a full change of control  whereas the merger does not
involve a change of control. Using the mean multiples as a general guide, Lehman
Brothers selected certain  multiples that it believed  reflected the theoretical
transaction  multiples for ISP on a full change in control basis. Based on those
multiples,  this analysis indicated a range of equity values per share of $13.24
to $13.39.

     TRANSACTION PREMIA ANALYSIS

     Lehman  Brothers  reviewed  the premia paid for 30 selected  going  private
transactions  since  1998,  where (i) cash was used as  consideration,  (ii) the
remaining  minority  interest was less than 50%, and (iii) the transaction value
was greater than $100 million.  Lehman Brothers calculated the premium per share
paid by the acquiror for each respective  deal, as compared to the average share
price of the target company's common stock one day, 7 calendar days, 30 calendar
days and 90  calendar  days prior to the public  announcement  of each  selected
transaction. The analysis produced the following premia ranges:


                                       21




                                                                    PREMIA PAID OVER AVERAGE PRICE FOR:
                                           --------------------------------------------------------------------------------
                                             1 DAY                 7 DAYS                 30 DAYS                 90 DAYS
                                           ---------              ---------              ---------              -----------
                                                                                                        
Low:                                          9.9%                   13.2%                  13.1%                   13.5%
High:                                       140.0%                  136.9%                 113.3%                  116.0%
Mean:                                        46.4%                   47.7%                  49.2%                   42.2%
Median:                                      42.6%                   43.4%                  48.6%                   36.2%
Company Share Price Data:                    $7.95                   $7.82                  $6.92                   $8.32
Merger Consideration ($10.30):               29.6%                   31.7%                  48.8%                   23.8%


     Based on the mean and  median  data,  this  analysis  indicated  a range of
equity  values per share of $10.29 to  $11.83.  Lehman  Brothers  noted that the
merger consideration of $10.30 falls within this range.

     Lehman Brothers also reviewed the premia paid for 19 selected going private
transactions  since  1992,  where (i) cash was used as  consideration,  (ii) the
remaining  minority  interest was less than 20%, and (iii) the transaction value
was greater than $100 million.  Lehman Brothers calculated the premium per share
paid by the acquiror for each respective  deal, as compared to the average share
price of the target company's common stock one day, 7 calendar days, 30 calendar
days  and  90  calendar  days  prior  to  the   announcement  of  each  selected
transaction. The analysis produced the following premia ranges:



                                                                 PREMIA PAID OVER AVERAGE PRICE FOR:
                                          ----------------------------------------------------------------------------------
                                            1 DAY                   7 DAYS                 30 DAYS                 90 DAYS
                                          ---------                ---------              ---------              -----------
                                                                                                         
Low:                                          9.9%                   13.2%                  13.1%                    9.0%
High:                                       140.0%                  122.7%                  95.7%                   73.4%
Mean:                                        40.8%                   40.8%                  44.3%                   40.0%
Median:                                      43.5%                   41.2%                  42.9%                   39.9%
Company Share Price Data:                    $7.95                   $7.82                  $6.92                   $8.32
Merger Consideration ($10.30):               29.6%                   31.7%                  48.8%                   23.8%


     Based on the mean and  median  data,  this  analysis  indicated  a range of
equity  values  per share of $9.89 to  $11.65.  Lehman  Brothers  noted that the
merger consideration of $10.30 falls within this range.

     Lehman Brothers also reviewed the hypothetical performance of ISP stock had
the announcement of the proposal  letter,  dated July 8, 2002, from the Majority
Stockholder  not been made on July 8, 2002 by  applying  the return of the LBSCI
from July 8, 2002 through November 4, 2002 to ISP's stock price of $7.95 the day
prior to the announcement of the July 8, 2002 proposal letter. Over this period,
the  LBSCI  provided  a  negative  return  of  11.0%,  implying  a  hypothetical
"unaffected"  price  of  $7.07  per  share of ISP on  November  4,  2002 had the
announcement  not been made.  Lehman  Brothers  then applied the mean and median
1-day  premia  of  the  two  data  sets  described  above  to  the  hypothetical
"unaffected"  ISP stock  price at November 4, 2002.  This  analysis  indicated a
range of equity values per share of $9.96 to $10.35.  Lehman Brothers noted that
the merger consideration of $10.30 falls within this range.

     Additionally, Lehman Brothers reviewed the premia paid for 60 selected full
acquisitions  since 2000 that did not  constitute  going  private  transactions,
where  (i) cash was used as  consideration,  (ii)  the  target  company  was not
classified  as a  financial  services  or  technology  company,  and  (iii)  the
transaction value was greater than $100 million.  Lehman Brothers calculated the
premium per share paid by the acquiror for each respective  deal, as compared to
the average share price of the target company's common stock one day, 7 calendar
days, 30 calendar days and 90 calendar  days prior to the  announcement  of each
selected transaction. The analysis produced the following premia ranges:



                                                              PREMIA PAID OVER AVERAGE PRICE FOR:
                                      -----------------------------------------------------------------------------------
                                             1 DAY                 7 DAYS                 30 DAYS                 90 DAYS
                                           ---------              ---------              ---------              -----------
                                                                                                        
Low:                                         (7.8%)                  (7.4%)                 (3.4%)                  (9.1%)
High:                                       540.0%                  519.4%                 411.7%                  267.7%
Mean:                                        44.1%                   45.6%                  48.1%                   51.7%
Median:                                      28.8%                   31.7%                  33.5%                   37.6%
Company Share Price Data:                    $7.95                   $7.82                  $6.92                   $8.32
Merger Consideration ($10.30):               29.6%                   31.7%                  48.8%                   23.8%


     Based on the mean and  median  data,  this  analysis  indicated  a range of
equity  values  per share of $9.24 to  $12.62.  Lehman  Brothers  noted that the
merger consideration of $10.30 falls within this range.


                                       22


     DISCOUNTED CASH FLOW ANALYSIS

     Lehman Brothers  performed a discounted cash flow analysis on the projected
financial  information  of ISP for the fiscal years 2003 through 2007 based upon
the Updated Projections through 2006 and extrapolated financial results for 2007
based upon operating and financial assumptions,  forecasts and other information
provided to Lehman  Brothers by the management of ISP.  Using this  information,
Lehman  Brothers  discounted to present  (December 31, 2002) value the projected
stream of unlevered net income  (earnings  before  interest and after taxes) for
the fiscal  years 2003 to 2007 as adjusted  for (1) certain  projected  non-cash
items  (such  as  depreciation  and   amortization);   (2)  forecasted   capital
expenditures;  and (3) forecasted working capital  adjustments.  To estimate the
residual  value  of ISP at the end of the  forecast  period  ("Terminal  Value")
Lehman  Brothers  applied  a range of 3.0% to 5.0%  perpetuity  growth  rates to
projected  fiscal  2007 free cash  flow.  Lehman  Brothers  also  estimated  the
Terminal Value by applying a range of 6.7x to 8.0x multiples to projected fiscal
2007 EBITDA. Lehman Brothers used after tax discount rates of 9% to 11%.

     Based on these  discount  rates and a selected  range of  terminal  values,
Lehman Brothers  calculated the implied equity value per share at  approximately
$8.11 to $14.02.  Lehman Brothers noted that the merger  consideration of $10.30
falls within this range.

     Lehman  Brothers  performed a similar  discounted  cash flow  analysis with
regard to the  projected  financial  information  for ISP based on the Five-Year
Plan.  This  analysis   resulted  in  an  implied  equity  value  per  share  of
approximately $10.90 to $18.03.

     Lehman Brothers is an  internationally  recognized  investment banking firm
and, as part of its investment banking  activities,  is regularly engaged in the
valuation of businesses  and their  securities  in  connection  with mergers and
acquisitions,    negotiated    underwritings,    competitive   bids,   secondary
distributions  of  listed  and  unlisted  securities,   private  placements  and
valuations  for corporate and other  purposes.  The special  committee  selected
Lehman Brothers  because of its expertise,  reputation and familiarity  with ISP
and the  chemicals  industry  generally,  and  because  its  investment  banking
professionals  have  substantial  experience in  transactions  comparable to the
merger.

     As compensation  for its services in connection  with the merger,  ISP paid
Lehman Brothers $1.4 million, which was not contingent upon either the execution
of the merger  agreement or  consummation  of the merger.  In addition,  ISP has
agreed to  reimburse  Lehman  Brothers  for  reasonable  out-of-pocket  expenses
incurred in connection with its engagement and to indemnify  Lehman Brothers and
related persons for certain  liabilities that may arise out of its engagement by
the special committee and the rendering of its fairness opinion.

     IN THE ORDINARY COURSE OF ITS BUSINESS,  LEHMAN BROTHERS MAY ACTIVELY TRADE
IN THE DEBT OR EQUITY SECURITIES OF ISP AND ITS SUBSIDIARIES FOR ITS OWN ACCOUNT
AND FOR THE ACCOUNTS OF ITS CUSTOMERS AND,  ACCORDINGLY,  MAY AT ANY TIME HOLD A
LONG OR SHORT POSITION IN SUCH SECURITIES.

ISP'S FORECASTS

     ISP does not,  as a matter of course,  publicly  disclose  forecasts  as to
future revenues or earnings. However, ISP management did prepare forecasts which
were provided to the Majority  Stockholder  in his capacity as Chairman of ISP's
board of directors and Lehman Brothers in connection with its financial analysis
of ISP and the  merger  proposal.  The  forecasts  are  included  in this  proxy
statement  only because ISP provided  that  information  to Lehman  Brothers and
Lehman  Brothers  used the data in  connection  with its  fairness  opinion  and
related   presentation  to  the  special  committee  and  because  the  Majority
Stockholder had access to that data.
See "--Opinion of Lehman Brothers."

     ISP's  forecasts  were not prepared with a view to public  disclosure.  ISP
expects  actual and  forecasted  results to differ,  and actual  results  may be
materially  different  than  those  set forth  below.  ISP did not  prepare  the
forecasts  with a  view  to  complying  with  the  published  guidelines  of the
Securities and Exchange Commission regarding forecasts,  and ISP did not prepare
the  forecasts in accordance  with the  guidelines  established  by the American
Institute of Certified  Public  Accountants for preparation and  presentation of
financial  forecasts.  The projected  financial  information set forth below has
been prepared by and is the responsibility of ISP's management.  Moreover, ISP's
independent auditors have not examined,  compiled, or applied any procedures to,
the forecasts in accordance with standards established by the American Institute
of Certified Public Accountants and express no opinion or any assurance on their
reasonableness, accuracy or achievability.

     The projected  financial  data set forth below  constitute  forward-looking
statements.  It is not  possible  to predict  whether  the  assumptions  made in
preparing the forecasts will be valid,  and ISP cautions  stockholders  that any
such  forward-looking  statements are not guarantees of future performance.  ISP
cannot assure you that these forecasts will be realized, and actual


                                       23


results may be materially  more or less  favorable  than those  contained in the
forecasts set forth below. Investors should consider the risks and uncertainties
in our business that may affect future  performance and that are discussed under
"Special  Note  Regarding  Forward-Looking  Statements"  and  in  the  documents
incorporated by reference in this proxy statement.

     ISP's  inclusion of the  forecasts  should not be regarded as an indication
that  ISP,  the  special  committee,   the  board  of  directors,  the  Majority
Stockholder,  ISPH or Lehman Brothers considered or consider the forecasts to be
a reliable  prediction of future events,  and the forecasts should not be relied
upon as such. To the extent that these forecasts represent ISP management's best
estimate of possible  future  performance,  this estimate is made only as of the
date  of the  forecasts  and  not as of  any  later  date.  In  particular,  the
projections  for  2003-2006  included  in the  Five-Year  Plan were  prepared in
December 2001 and have been superseded by the Updated Projections.  ISP does not
intend to update,  revise or correct these forecasts if they become  inaccurate.
Stockholders  should  take this into  account  when  evaluating  any  factors or
analyses based on ISP's forecasts.

     As discussed above, on September 3, 2002 ISP's  management  provided Lehman
Brothers with the Five-Year  Plan.  The Five-Year  Plan was prepared in December
2001 for  presentation  to ISP's  board of  directors  in April  2002.  Prior to
delivering  the Five-Year  Plan to Lehman  Brothers,  management  reviewed ISP's
financial performance  (excluding ISP's investment activities) for the first six
months of 2002 and  revised  the 2002  full-year  projections  contained  in the
Five-Year  Plan, but did not undertake to update or confirm the  projections for
years 2003-2006.  Therefore,  the projections in the Five-Year Plan for the 2002
year were made as of September 3, 2002,  but the  2003-2006  projections  in the
Five-Year Plan were made as of December  2001. The  projections of net sales and
operating  income  contained in the  Five-Year  Plan (as adjusted) are set forth
below:



                                                                      FIVE-YEAR PLAN
                                          ----------------------------------------------------------------------
                                                              FISCAL YEARS ENDED DECEMBER 31,
                                          ----------------------------------------------------------------------
                                           2002 (1)         2003           2004          2005           2006
                                           ---------      ---------      ---------     ---------      ---------
                                                                      ($ in millions)
                                                                                         
NET SALES:
Personal Care.........................        $207.7        $218.5         $227.8        $237.3         $248.2
Pharmaceutical, Food and
   Beverage...........................         247.3         254.8          270.4         286.7          305.0
Performance Chemicals, Fine
   Chemicals and Industrial...........         304.1         275.5          284.4         292.5          301.4
                                           ---------      ---------      ---------     ---------      ---------
   Total Specialty Chemicals..........         759.1         748.8          782.6         816.5          854.6
Mineral Products......................          92.9          93.5           98.0         100.0          102.4
                                           ---------      ---------      ---------     ---------      ---------
   Total..............................        $852.1        $842.3         $880.6        $916.5         $957.0
                                           =========      =========      =========     =========      =========

OPERATING INCOME:(2)
Personal Care.........................        $ 33.1        $ 47.0         $ 49.6        $ 52.3         $ 54.2
Pharmaceutical, Food and
   Beverage...........................          59.6          62.3           66.8          71.6           75.4
Performance Chemicals, Fine
   Chemicals and Industrial...........           8.4           1.1            4.6           8.5           11.9
                                           ---------      ---------      ---------     ---------      ---------
   Total Specialty Chemicals..........         101.1         110.4          121.0         132.4          141.5
Mineral Products......................          19.8          19.3           20.0          20.5           20.6
                                           ---------      ---------      ---------     ---------      ---------
   Total..............................        $120.9        $129.7         $141.0        $152.9         $162.1
                                           =========      =========      =========     =========      =========



-----------
(1)  Updated September 3, 2002

     The  forecasts  from the original  Five-Year  Plan  prepared  December 2001
     projected  net sales for 2002 of $821.4  million and  operating  income for
     2002 of $120.7 million.  These forecasts  included $209.9 million net sales
     and $44.8 million  operating  income for the personal care segment;  $239.6
     million  and  $57.9  million  for the  pharmaceutical,  food  and  beverage
     segment;  $288.7  million and $1.6 million for the  performance  chemicals,
     fine chemicals and industrial;  and $83.2 million and $16.4 million for the
     minerals segment.

(2)  Excludes investment income and loss.

     For the reasons  described under  "--Background  of the Merger," in October
2002, ISP's management  updated the projections  reflected in the Five-Year Plan
for  developments  occurring  after  December  2001 and provided  those  Updated
Projections to Lehman  Brothers on October 10, 2002 and again to Lehman Brothers
and the special committee on October 21, 2002. The Updated Projections took into
account changes in circumstances since the preparation in the Five-Year Plan


                                       24


and  represented  ISP  management's  estimates of future  financial  performance
(excluding ISP's  investment  activities) for the years 2002 through 2006, as of
October  10,  2002 and  October  21,  2002.  The  projections  of net  sales and
operating income, as reflected in the Updated Projections, are set forth below:



                                                                    UPDATED PROJECTIONS
                                          ----------------------------------------------------------------------
                                                              FISCAL YEARS ENDED DECEMBER 31,
                                          ----------------------------------------------------------------------
                                             2002           2003           2004          2005           2006
                                           ---------      ---------      ---------     ---------      ---------
                                                                      ($ in millions)
                                                                                         
NET SALES:
Personal Care.........................        $207.7        $215.0         $220.0        $230.0         $240.0
Pharmaceutical, Food and
   Beverage...........................         247.3         267.0          275.0         283.0          290.0
Performance Chemicals, Fine
   Chemicals and Industrial...........         304.1         283.0          291.0         298.0          309.0
                                           ---------      ---------      ---------     ---------      ---------
   Total Specialty Chemicals..........         759.1         765.0          786.0         811.0          839.0
Mineral Products......................          92.9          87.0           89.0          91.0           93.0
                                           ---------      ---------      ---------     ---------      ---------
   Total..............................        $852.1        $852.0         $875.0        $902.0         $932.0
                                           =========      =========      =========     =========      =========

                                                                    UPDATED PROJECTIONS
                                          ----------------------------------------------------------------------
                                                              FISCAL YEARS ENDED DECEMBER 31,
                                          ----------------------------------------------------------------------
                                             2002           2003           2004          2005           2006
                                           ---------      ---------      ---------     ---------      ---------
                                                                      ($ in millions)
                                                                                         
OPERATING INCOME:(1)
Personal Care.........................        $ 33.1        $ 34.5         $ 36.5        $ 39.5         $ 42.0
Pharmaceutical, Food and
   Beverage...........................          59.6          66.0           69.5          72.5           74.5
Performance Chemicals, Fine
   Chemicals and Industrial...........           8.4           3.5            7.0           9.5           11.0
                                           ---------      ---------      ---------     ---------      ---------
   Total Specialty Chemicals..........         101.1         104.0          113.0         121.5          127.5
Mineral Products......................          19.8          14.0           14.5          15.0           15.5
                                           ---------      ---------      ---------     ---------      ---------
   Total..............................         120.9         118.0          127.5         136.5          143.0
Contingency Provision.................            --          (3.0)          (4.5)         (4.5)          (4.5)
                                           ---------      ---------      ---------     ---------      ---------
   Forecast Operating Income..........        $120.9        $115.0         $123.0        $132.0         $138.5
                                           =========      =========      =========     =========      =========


(1)  Excludes investment income and loss.

REASONS FOR THE MERGER; PURPOSE AND STRUCTURE OF THE MERGER

     The  purpose of the merger is to permit  holders of ISP's  common  stock to
realize a significant cash premium to ISP's  historical  market prices for their
shares  and for the  Majority  Stockholder  to  increase  his  equity  ownership
interest in ISP from approximately 81% to 100%. The Majority Stockholder decided
to pursue the merger at this time for a number of reasons.  First,  the Majority
Stockholder  believes  that ISP has been  unable to realize  some of the primary
anticipated  benefits of having publicly traded equity securities.  For example,
as a result of ISP's small public float,  ISP has been unable to utilize the ISP
common  stock  as  a  currency  for  acquisitions.  In  addition,  the  lack  of
appreciation  of the ISP common  stock has impaired  ISP's  ability to use stock
options and other  equity-based  incentives as a meaningful  tool to attract and
retain employees.

     Moreover,  the Majority Stockholder believes that the near- and medium-term
prospects of increasing ISP  stockholder  value are  unfavorable for a number of
reasons.  Attracting  public investors to a company with a majority  stockholder
and a small  public  float  is  inherently  difficult  and has  been  made  more
difficult  by the general  stock  market  downturn.  In  addition,  the Majority
Stockholder  believes that the  volatility of ISP's  earnings as a result of its
substantial  portfolio of investment securities has negatively impacted and will
likely  continue to  negatively  impact  ISP's stock  performance  in the public
market.

     The  Majority  Stockholder  believes  that without the  constraints  of the
public market,  and in particular the market's  emphasis on quarterly  earnings,
ISP's  management  will have greater  flexibility  to  effectively  manage ISP's
assets and to make decisions that may negatively impact quarterly earnings,  but
that may increase the value of ISP's assets or earnings over the long term. In a
public company  setting,  decisions that negatively  affect  quarterly  earnings
could significantly reduce ISP's share price.


                                       25


     Finally,  following  the  merger,  ISP will no  longer  be  subject  to the
reporting  requirements of the Securities Exchange Act of 1934, which will allow
ISP to eliminate the costs of preparing,  printing and mailing certain corporate
reports and proxy  statements.  In addition,  "going  private" will allow ISP to
eliminate  certain  other  costs and  functions  associated  with being a public
company,  including certain legal and accounting costs, the costs of maintaining
a transfer agent and the costs of investor relations activities. The elimination
of the foregoing  requirements will also eliminate the time devoted by employees
and members of ISP's  management to those  activities,  thereby  providing  more
freedom to focus on ISP's business and operations.

     The Majority Stockholder has considered certain alternatives to the merger,
including  having ISP  remain  public  without  acquiring  additional  shares or
pursuing a public  offering  to increase  the  liquidity  of the public  trading
market for the ISP common stock. However, in light of capital market conditions,
the  above-mentioned  difficulty of attracting  public  investors to ISP and the
Majority Stockholder's desire to retain his full investment in ISP, the Majority
Stockholder  concluded  that such an offering  could not be effected  without an
unacceptable  level of dilution.  In addition,  as noted in "--Background of the
Merger," the Majority Stockholder considered the possibility of pursuing a going
private  transaction  by means of a  tender  offer  rather  than a  merger,  but
ultimately concluded that the merger constituted a preferable means of effecting
the proposed transaction.

EFFECTS OF THE MERGER; PLANS OR PROPOSALS AFTER THE MERGER

     After the  effective  time of the merger,  holders of our common stock will
cease to have  ownership  interests in ISP or rights as our  stockholders.  As a
result of the merger,  the Majority  Stockholder will be the sole beneficiary of
our future earnings and growth, if any. Similarly, the Majority Stockholder will
also bear the risk of any losses generated by our operations and any decrease in
our value after the merger.

     Following the merger,  our common stock will no longer be traded on the New
York Stock Exchange. In addition, the registration of our common stock under the
Securities Exchange Act of 1934 will be terminated. Due to this termination, the
periodic  reporting  requirements  under that Act, certain provisions of Section
16(b) of that Act,  and  requirements  that we  furnish  a proxy or  information
statement in connection with stockholders'  meetings will no longer apply to us.
After the  effective  time of the merger,  there will be no publicly  traded ISP
common stock  outstanding.  Except to the extent  required by  outstanding  debt
securities  of our  affiliates,  we would no longer be required to file periodic
reports with the Securities and Exchange Commission.

     From and after the  effective  time of the merger,  our  current  directors
(other than Mr.  Sanford  Kaplan and the members of the special  committee)  and
officers will remain the directors and officers of ISP,  until their  successors
are duly elected or appointed and qualified.

     The Majority  Stockholder expects that following  completion of the merger,
ISP's business operations will be conducted  substantially as they are currently
being  conducted.  The  Majority  Stockholder  has no  other  current  plans  or
proposals or  negotiations  which relate to or would result in an  extraordinary
corporate transaction involving our corporate structure, business or management,
such as a merger, reorganization,  liquidation, relocation of any operations, or
sale or  transfer of a material  amount of assets.  Nevertheless,  the  Majority
Stockholder  may  initiate  from  time to  time  reviews  of us and our  assets,
corporate  structure,  capitalization,  operations,  properties,  management and
personnel to determine what changes,  if any,  would be desirable  following the
merger in order best to organize  ISP's  activities.  The  Majority  Stockholder
expressly  reserves  the right to make any changes  that he deems  necessary  or
appropriate in light of his review or in light of future developments.

     In addition, the Majority Stockholder may also consider material changes in
the  present  dividend  rate  and  policy,   indebtedness,   capitalization  and
management and employee  incentive plans and may consider  pursuing  acquisition
opportunities through ISP.

INTERESTS OF DIRECTORS AND EXECUTIVE OFFICERS IN THE MERGER

     ISP's board of directors and executive  officers have various  interests in
the merger described in this section that are in addition to, or different from,
the interests of ISP's stockholders generally. ISP stockholders should keep this
in mind when considering the  recommendation of ISP's board of directors for the
adoption of the merger agreement.

     STOCK OPTIONS; RESTRICTED SHARES

     The  merger  agreement   provides  that  as  of  the  effective  time,  all
outstanding and  unexercised  employee stock options on ISP common stock granted
pursuant to the 1991 Incentive Plan for Key Employees and Directors and the 2000
Stock  Option  Plan for  Non-Employee  Directors  will be  canceled.  The merger
agreement provides that, in consideration for that cancellation,  the holders of
the options  will have the right to receive a cash  payment.  The amount of this
payment will equal


                                       26


the excess,  if any, of the merger  consideration of $10.30 in cash per share of
ISP common stock over the per share exercise price of the options, multiplied by
the number of shares of ISP common stock  subject to those  options,  reduced by
applicable withholding taxes.

     In addition,  the merger  agreement  provides that each share of restricted
ISP common  stock will be  exchanged  for the right to receive an amount in cash
equal to $10.30,  as reduced by  applicable  withholding  taxes,  subject to the
vesting restrictions that were applicable to the underlying restricted shares.

     Our   executive   officers  and  directors   currently   hold  a  total  of
approximately 1,072,500 options.  Approximately 496,000 of these options have an
exercise price below the $10.30 merger consideration and all but 19,000 of those
"in-the-money"  options  are vested.  The  aggregate  spread that our  executive
officers and directors  would be entitled to receive for all of their options as
of the date of this proxy statement is approximately $1.55 million. In addition,
our  executive  officers and directors  hold  approximately  500,000  restricted
shares of ISP common stock.

     INDEMNIFICATION AND INSURANCE

     Following  the  completion  of the merger,  ISP is  required to  indemnify,
defend and hold  harmless,  to the full  extent  permitted  by law,  all current
officers  and  directors  of ISP  against all losses,  claims,  damages,  costs,
expenses  or  liabilities  or  in  connection  with  any  claim,  action,  suit,
proceeding  or  investigation  arising  out of the fact  that the  person  is an
officer or  director  of ISP (or out of any action  taken by any such  person on
behalf of ISP),  pertaining  to any matter  existing or occurring on or prior to
the effective time of the merger (including the transactions contemplated by the
merger  agreement),  whether  asserted or claimed prior to, or on or after,  the
effective  time of the merger.  In  addition,  ISP is  required to maintain  its
directors and  officers'  liability  insurance  policies in effect for six years
after the effective time of the merger,  except that ISP will not be required to
pay annual  insurance  premiums in excess of 200% of the  premiums it  currently
pays.

     On August 7, 2002, ISP entered into indemnity  agreements  with each member
of the special committee.  Pursuant to the indemnity  agreements,  ISP agreed to
indemnify Messrs. Englander,  Manning and Meckler for any expenses,  liabilities
and losses relating to their service as members of the special  committee and/or
the board of directors  in  connection  with the  transaction.  These  indemnity
agreements are in addition to the indemnity  available to the special  committee
members pursuant to ISP's amended and restated certificate of incorporation.

MATERIAL U.S. FEDERAL INCOME TAX CONSEQUENCES OF THE MERGER TO OUR STOCKHOLDERS

     The following is a summary of United States federal income tax consequences
of the merger to  stockholders  whose shares of ISP common  stock are  converted
into the right to receive cash under the merger.  The  discussion is for general
information  only and does not purport to consider all aspects of United  States
federal  income  taxation  that  might  be  relevant  to our  stockholders.  The
discussion  is based on current  law which is subject  to change  possibly  with
retroactive  effect. The discussion applies only to stockholders who hold shares
of our common stock as capital assets, and may not apply to shares of our common
stock  received in  connection  with the exercise of employee  stock  options or
otherwise  as  compensation,  or to  certain  types  of  stockholders  (such  as
insurance  companies,  tax-exempt  organizations,   financial  institutions  and
broker-dealers)  who may be subject to special rules.  This  discussion does not
discuss the tax consequences to any of our  stockholders  who, for United States
federal  income  tax  purposes,  is a  non-resident  alien  individual,  foreign
corporation,  foreign  partnership  or  foreign  estate or  trust,  and does not
address any aspect of state, local or foreign tax laws.

     The receipt of cash for shares of our common  stock in the merger will be a
taxable transaction for United States federal income tax purposes. In general, a
stockholder  who  surrenders  shares of our common  stock for cash in the merger
will  recognize  capital  gain or loss for  United  States  federal  income  tax
purposes equal to the  difference,  if any,  between the amount of cash received
and the  stockholder's  adjusted  tax basis in the  shares of ISP  common  stock
surrendered. Gain or loss will be determined separately for each block of shares
(i.e., shares acquired at the same cost in a single transaction) surrendered for
cash pursuant to the merger. Such gain or loss will be long-term capital gain or
loss provided that a  stockholder's  holding period for such shares is more than
12 months at the time of the consummation of the merger. Long-term capital gains
of individuals are eligible for reduced rates of taxation. There are limitations
on the deductibility of capital losses.


                                       27


     In general,  cash received by stockholders who exercise statutory appraisal
rights under Section 262 of the Delaware  General  Corporation Law in respect of
such  appraisal  rights will result in the  recognition  of gain or loss to such
stockholders.  Any stockholder who is considering exercising statutory appraisal
rights should consult with its own tax advisor for a full  understanding  of the
tax  consequences of the receipt of cash in respect of appraisal rights pursuant
to the merger.

     Under the U.S.  federal backup  withholding tax rules,  unless an exemption
applies, the paying agent will be required to withhold,  and will withhold,  30%
of all cash  payments  to which a holder of shares is  entitled  pursuant to the
merger agreement,  unless the stockholder  provides a tax identification  number
(social   security   number,   in  the  case  of  an  individual,   or  employer
identification  number, in the case of other stockholders),  certifies that such
number is correct,  and  otherwise  complies  with such backup  withholding  tax
rules. Each of our stockholders should complete and sign the Substitute Form W-9
included  as part of the  letter of  transmittal  to be  returned  to the paying
agent, in order to provide the information and certification  necessary to avoid
backup  withholding  tax,  unless an exemption  applies and is  established in a
manner satisfactory to the paying agent.

     THE U.S.  FEDERAL INCOME TAX  CONSEQUENCES  SET FORTH ABOVE ARE FOR GENERAL
INFORMATION  ONLY AND ARE NOT INTENDED TO CONSTITUTE A COMPLETE  DESCRIPTION  OF
ALL TAX CONSEQUENCES  RELATING TO THE MERGER.  BECAUSE INDIVIDUAL  CIRCUMSTANCES
MAY  DIFFER,  EACH  STOCKHOLDER  SHOULD  CONSULT THE  STOCKHOLDER'S  TAX ADVISOR
REGARDING THE  APPLICABILITY OF THE RULES DISCUSSED ABOVE TO THE STOCKHOLDER AND
THE  PARTICULAR  TAX EFFECTS TO THE  STOCKHOLDER  OF THE MERGER,  INCLUDING  THE
APPLICATION OF STATE, LOCAL AND FOREIGN TAX LAWS.

LITIGATION

     In July of  2002,  six  purported  class  action  suits  were  filed in the
Delaware  Court of Chancery  against ISP and members of its board of  directors.
These six suits have been  consolidated.  On July 12,  2002,  a purported  class
action suit was also filed in the United States District Court,  District of New
Jersey,  against  ISP and  members of its  board.  The  Delaware  and New Jersey
complaints  allege,  among  other  things,  that the  defendants  have  breached
fiduciary  and  other  duties  in  connection  with the  Majority  Stockholder's
proposal to acquire beneficial  ownership of all shares of ISP common stock that
he did not already  beneficially  own. These  complaints  variously seek,  among
other things,  a court order enjoining the proposed  transaction and an award of
unspecified damages and attorneys' fees.

     Following   settlement   discussions   between  counsel  for  the  Majority
Stockholder   and  counsel  for  plaintiffs  in  the  Delaware  and  New  Jersey
litigations,  on November 19, 2002,  the parties to the  stockholder  litigation
pending in Delaware  agreed on and executed a  memorandum  of  understanding  to
reflect a proposed  settlement  of the  Delaware  litigation.  The parties  also
agreed,  subject to various  conditions,  to enter into a settlement  agreement,
cooperate in public  disclosures  related to the settlement and use best efforts
to gain approval of the settlement by the Delaware courts. Without any admission
of fault by the  defendants,  the  memorandum of  understanding  contemplates  a
dismissal of all claims with  prejudice and a release in favor of all defendants
of any and all claims  related  to the merger  that have been or could have been
asserted by the plaintiffs or any members of the purported class  (including the
pending  claims in the New Jersey  litigation).  The  settlement  is subject to,
among other  factors,  completion  of  confirmatory  discovery,  execution  of a
settlement  agreement and final approval of the settlement by the Delaware Court
of Chancery and completion of the merger.


                                       28


                               THE SPECIAL MEETING

     This proxy  statement is furnished in connection  with the  solicitation of
proxies by our board of directors in  connection  with a special  meeting of our
stockholders.

DATE, TIME AND PLACE OF THE SPECIAL MEETING

     The special meeting is scheduled to be held as follows:

     DATE:_____________, 2003

     TIME:_____________

     PLACE:_____________



PROPOSAL TO BE CONSIDERED AT THE SPECIAL MEETING

     At the  special  meeting,  you will be asked to  consider  and vote  upon a
proposal to adopt an agreement and plan of merger, dated as of November 8, 2002,
between ISP and ISPH,  a  corporation  100%  beneficially  owned by the Majority
Stockholder  and to consider such other business as may properly come before the
meeting and all adjournments or postponements thereof.

RECORD DATE

     The board of directors has fixed the close of business on __________,  2002
as the record date for the special  meeting and only  holders of common stock on
the record date are entitled to notice of and to vote at the special meeting. On
that date, there were approximately _ holders of record of ISP common stock, and
_  shares  of  common  stock  outstanding.  On the  record  date,  the  Majority
Stockholder  beneficially  owned  _  outstanding  shares  of ISP  common  stock,
representing approximately 81% of the total voting power of ISP.

VOTING RIGHTS; VOTE REQUIRED FOR APPROVAL

     Each  share of ISP  common  stock  entitles  its  holder to one vote on all
matters  properly  coming  before the special  meeting.  A majority of the total
number of all outstanding  shares of common stock entitled to vote,  represented
in person or by proxy,  will  constitute  a quorum at the special  meeting.  The
Majority Stockholder has agreed, pursuant to a voting agreement, to cause all of
the shares  beneficially  owned by him at the time of the meeting (but excluding
shares held by qualified  charitable  organizations) to be represented in person
or by proxy at the meeting. Accordingly, a quorum at the meeting is assured.

     If you hold your  shares  in an  account  with a broker  or bank,  you must
instruct  the broker or bank on how to vote your  shares.  If an executed  proxy
card returned by a broker or bank holding  shares  indicates  that the broker or
bank does not have discretionary authority to vote on the adoption of the merger
agreement,  the shares will be considered present at the meeting for purposes of
determining  the presence of a quorum,  but will not be voted on the proposal to
adopt the merger  agreement.  This is called a broker  non-vote.  Your broker or
bank will vote your shares only if you  provide  instructions  on how to vote by
following the instructions provided to you by your broker or bank.

     Under Delaware law, the merger agreement must be adopted by the affirmative
vote of the holders of a majority of the shares of common stock  outstanding and
entitled to vote at the special meeting.  The Majority Stockholder has agreed in
the voting agreement to cause all of the shares beneficially owned by him at the
time  of  the  meeting  (but  excluding  shares  held  by  qualified  charitable
organizations) to vote "FOR" the merger agreement, which will assure adoption of
the merger agreement under Delaware law.

     In addition,  although not required under the Delaware General  Corporation
Law or the amended and restated  certificate of incorporation or by-laws of ISP,
the merger  agreement  requires  that the majority of the minority  condition be
satisfied.

     Abstentions,  failures  to vote and  broker  non-votes  will  have the same
effect as a vote  against the adoption of the merger  agreement  for purposes of
obtaining a majority of all shares of ISP common  stock.  However,  abstentions,
failures  to vote and  broker  non-votes  will not  affect  satisfaction  of the
majority of the minority condition.

     Each of our directors and executive  officers has indicated  that he or she
intends  to vote  his or her own  shares  in  favor of  adoption  of the  merger
agreement.  If the Majority  Stockholder  and each of our directors and officers
vote as we expect,  _% of the  outstanding  shares of ISP common stock will have
voted for adoption of the merger agreement.


                                       29


VOTING AND REVOCATION OF PROXIES

     Stockholders  should mark, date, sign and return the proxy card and mail it
in the enclosed envelope as soon as possible so that your shares are represented
at the special meeting, even if you plan to attend the meeting in person.

     Proxies received at any time before the special meeting, and not revoked or
superseded  before being voted,  will be voted at the special  meeting.  Where a
specification is indicated by the proxy, it will be voted in accordance with the
specification.  Where no  specification  is  indicated,  the proxy will be voted
"FOR" the proposal to adopt the merger  agreement  and in the  discretion of the
persons  named in the proxy with  respect to any other  business  which may come
before the meeting or any adjournment of the meeting. However, no proxies marked
"AGAINST" the proposal to adopt the merger agreement will be voted in favor of a
motion to adjourn or postpone the special  meeting for the purpose of soliciting
further  proxies  in favor of  adoption  of the merger  agreement.  Our board of
directors  is not  currently  aware of any  business  to be  brought  before the
special meeting other than that described in this proxy statement.

     Until your proxy is exercised at the special  meeting,  you can revoke your
proxy and change your vote in any of the following ways:

     o    by delivering  written  notification of revocation to our Secretary at
          our executive offices at 1361 Alps Road, Wayne, New Jersey 07470,

     o    by delivering a proxy of a later date,

     o    by attending the special meeting and voting in person. Your attendance
          at the meeting will not, by itself,  revoke your proxy;  you must vote
          in person at the meeting, or

     o    if you have instructed a broker to vote your shares,  by following the
          directions received from your broker to change those instructions.

     Votes will be tabulated by our transfer agent, The Bank of New York.

SOLICITATION OF PROXIES

     We will bear the expenses in connection  with the  solicitation of proxies.
Arrangements  will  also be made with  brokerage  houses  and other  custodians,
nominees and  fiduciaries  for the  forwarding of  solicitation  material to the
beneficial  owners of common  stock held of record by such  persons,  and we may
reimburse  them  for  their  reasonable   transaction  and  clerical   expenses.
Solicitation  of proxies will be made  principally by mail.  Proxies may also be
solicited  in person,  or by  telephone,  facsimile,  telegram or other means of
communication,  by our officers and regular employees. These people will receive
no additional  compensation  for these services,  but will be reimbursed for any
transaction expenses incurred by them in connection with these services.

     We have also retained Georgeson  Shareholder  Communications  Inc., a proxy
solicitation firm, for a fee of $7,500 plus transaction  expenses,  to assist in
the solicitation of proxies from  stockholders,  including  brokerage houses and
other custodians, nominees and fiduciaries.


                                       30


                                   THE MERGER

     This  section  of the proxy  statement  describes  material  aspects of the
proposed  merger,  including  the merger  agreement,  which is  incorporated  by
reference to this proxy  statement  and is attached  hereto as Annex A. While we
believe  that the  description  covers the  material  terms of the merger,  this
summary is qualified  in its  entirety by reference to the complete  text of the
merger agreement and may not contain all of the information that is important to
you. You should carefully read this entire proxy statement, the merger agreement
and the other documents we refer you to for a more complete understanding of the
merger.

     In the  merger,  ISPH  will  merge  into  ISP  with  ISP  as the  surviving
corporation in the merger.

     As a result of the merger, ISP will cease to be a publicly held company and
will  become  a  private  corporation,  all  of  the  stock  of  which  will  be
beneficially owned by the Majority Stockholder.

EFFECTIVE TIME OF MERGER

     If the merger  agreement is adopted by the requisite  votes of stockholders
and the other  conditions  to the merger are  satisfied  or waived to the extent
permitted,  the merger will be  consummated  and become  effective at the time a
certificate  of  merger  is filed  with the  Secretary  of State of the State of
Delaware  or any  later  time as ISP and  ISPH  agree  upon and  specify  in the
certificate  of merger.  The filing is expected to occur as soon as  practicable
after adoption and approval of the merger  agreement by ISP  stockholders at the
special meeting and satisfaction or waiver of the other conditions to the merger
set forth in the merger agreement.  Upon the completion of the merger, ISPH will
cease to exist  and ISP  will  continue  as the  surviving  corporation.  If our
stockholders adopt the merger agreement, we expect to complete the merger during
the first quarter of 2003.

PAYMENT OF MERGER CONSIDERATION AND SURRENDER OF STOCK CERTIFICATES

     If we complete the merger, our common  stockholders  (other than holders of
common  stock  beneficially  owned by the Majority  Stockholder  and holders who
perfected their appraisal rights under Delaware law) will be entitled to receive
$10.30 in cash for each share of ISP common  stock that they own.  In  addition,
charitable  organizations  that own  common  stock will be  entitled  to receive
$10.30 in cash for each  share of ISP common  stock  that they own,  even if the
shares are beneficially owned by the Majority Stockholder.

     We will designate a paying agent to make the cash payments  contemplated by
the merger agreement.  From time to time after the effective time of the merger,
ISP will  deposit in trust with the paying  agent  funds  sufficient  to pay the
merger consideration to stockholders.  The paying agent will deliver your merger
consideration to you according to the procedure summarized below.

     After  the  effective  time of the  merger we will not  transfer  shares of
common stock that were  outstanding  immediately  prior to the effective time on
our stock transfer books. If you present common stock  certificates to us or our
paying  agent after the  effective  time of the  merger,  we will cancel them in
exchange for cash as described in this section.

     As soon as practicable after the effective time of the merger, we will send
you,  or  cause to be sent to you,  a letter  of  transmittal  and  instructions
advising  you how to  surrender  your  certificates  in exchange  for the merger
consideration.

     The paying  agent will pay your  merger  consideration,  together  with any
dividends  to which you are  entitled,  to you after you have  surrendered  your
certificates to the paying agent.

     Interest  will not be paid or accrue in respect of cash  payments of merger
consideration. We will reduce the amount of any merger consideration paid to you
by any applicable withholding taxes.

     If the paying agent is to pay some or all of your merger consideration to a
person  other than you,  you must have your  certificates  properly  endorsed or
otherwise  in proper form for  transfer,  and you must pay any transfer or other
taxes payable by reason of the transfer or establish to ISP's  satisfaction that
the taxes have been paid or are not required to be paid.

     YOU SHOULD NOT FORWARD YOUR STOCK  CERTIFICATES TO THE PAYING AGENT WITHOUT
A LETTER OF TRANSMITTAL,  AND YOU SHOULD NOT RETURN YOUR STOCK CERTIFICATES WITH
THE ENCLOSED PROXY.

     The transmittal instructions will tell you what to do if you have lost your
certificate,  or it has been  stolen or  destroyed.  You will have to provide an
affidavit to that fact and, if required by our paying agent or ISP,  post a bond
in an  amount  that  the  paying  agent or ISP,  as the case may be,  reasonably
directs as indemnity against any claim that may be made against those parties in
respect of the certificate.


                                       31


     At the effective time of and after the merger, subject to the exceptions in
the next  sentence,  you will cease to have any rights as our  stockholder.  The
exceptions  include the right to receive dividends or other  distributions  with
respect to your shares with a record date before the effective  time,  the right
to  surrender  your   certificates   in  exchange  for  payment  of  the  merger
consideration  or, if you exercise your appraisal  rights,  the right to perfect
your right to receive payment for your shares pursuant to Delaware law.

ACCOUNTING TREATMENT

     For U.S. accounting and financial  reporting  purposes,  the acquisition of
shares  in the  merger  will be  accounted  for  under  the  purchase  method of
accounting.

FEES AND EXPENSES OF THE MERGER

     All fees and  expenses  in  connection  with the merger will be paid by the
party  incurring  those fees and expenses,  except that we will pay the expenses
related to the preparation, printing and mailing of this proxy statement and all
filing  and  other  fees  paid to the  Securities  and  Exchange  Commission  in
connection  with the merger.  The total fees and expenses in connection with the
merger are estimated to be approximately  $3.2 million.  This amount consists of
the following estimated fees:

     Legal and Other Professional Fees(1)              $2,750,000

     Printing, Proxy Solicitation and Mailing Costs       100,000

     Special Committee Fees                                60,000

     Filing Fees (SEC)                                     26,873

     Miscellaneous                                        250,000

     Total                                            $ 3,186,873


---------------
(1)  Includes fees paid to Lehman Brothers Inc.

FINANCING OF THE MERGER

     We and the Majority  Stockholder estimate that approximately $134.4 million
will be  required  to  complete  the  purchase  of shares of our  common  stock,
restricted  stock and  options  pursuant to the merger  (excluding  the fees and
expenses referred to above). The Majority Stockholder and ISP expect this amount
to be paid out of available funds of ISP at the effective time of the merger. We
currently  anticipate  that ISP will  obtain  those  funds by  entering  into an
intercompany  borrowing  arrangement  with its  subsidiary,  ISP  Investco  LLC,
pursuant to which ISP Investco LLC will lend ISP  unrestricted  funds sufficient
to pay the costs and expenses of the merger, including the merger consideration.
The merger is not conditioned on any financing arrangements.

APPRAISAL RIGHTS

     Under Section 262 of the Delaware  General  Corporation  Law, if you do not
wish to accept $10.30 per share in cash for your shares of common stock, you may
elect  to have  the  fair  value  of your  shares  of  common  stock  judicially
determined  and paid to you in cash,  together with a fair rate of interest,  if
any.  The  valuation  will  exclude  any  element  of  value  arising  from  the
accomplishment or expectation of the merger.  You may only exercise these rights
if you comply with the  provisions of Section 262. The  following  discussion is
not a complete  statement of the law  pertaining  to appraisal  rights under the
Delaware  General  Corporation Law, and is qualified in its entirety by the full
text of Section 262 set forth in Annex D.

     Under Section 262, where a proposed  merger is to be submitted for approval
at a  meeting  of  stockholders,  as in the  case of our  special  meeting,  the
corporation, not less than 20 days prior to the meeting, must notify each of its
stockholders  entitled  to  appraisal  rights  that these  appraisal  rights are
available and include in that notice a copy of Section 262. This proxy statement
will  constitute  this notice to the holders of common stock and the  applicable
statutory  provisions of the Delaware  General  Corporation  Law are attached to
this proxy  statement as Annex D. Any  stockholder  who wishes to exercise those
appraisal  rights or who  wishes to  preserve  the right to do so should  review
carefully the following discussion and Annex D to this proxy statement.  FAILURE
TO COMPLY WITH THE PROCEDURES  SPECIFIED IN SECTION 262 TIMELY AND PROPERLY WILL
RESULT IN THE LOSS OF APPRAISAL RIGHTS.  Moreover,  because of the complexity of
the  procedures  for exercising the right to seek appraisal of the common stock,
we believe that  stockholders  who consider  exercising those rights should seek
the advice of counsel.


                                       32


     All references in Section 262 and in this summary to a "stockholder" are to
the record holder of the shares of common stock as to which appraisal rights are
asserted.  A PERSON HAVING A BENEFICIAL  INTEREST IN SHARES OF COMMON STOCK HELD
OF RECORD IN THE NAME OF ANOTHER PERSON,  SUCH AS A BROKER OR NOMINEE,  MUST ACT
PROMPTLY  TO CAUSE THE RECORD  HOLDER TO FOLLOW  PROPERLY  THE STEPS  SUMMARIZED
BELOW AND IN A TIMELY MANNER TO PERFECT APPRAISAL RIGHTS.

     Any  holder  of  common  stock  wishing  to  exercise  the  right to demand
appraisal under Section 262 of the Delaware General Corporation Law must satisfy
each of the following conditions:

     o    the holder must  deliver to us a written  demand for  appraisal of its
          shares before the vote on the merger agreement at the special meeting.
          This  demand will be  sufficient  if it  reasonably  informs us of the
          identity of the stockholder  and that the stockholder  intends by that
          writing to demand the appraisal of its shares;

     o    the holder  must not vote its  shares of common  stock in favor of the
          merger agreement.  A proxy which does not contain voting  instructions
          will,  unless  revoked,  be voted in  favor of the  merger  agreement.
          Therefore, a stockholder who votes by proxy and who wishes to exercise
          appraisal  rights must vote  against the merger  agreement  or abstain
          from voting on the merger agreement; and

     o    the holder must  continuously  hold its shares from the date of making
          the demand through the  effectiveness of the merger. A stockholder who
          is the record holder of shares of common stock on the date the written
          demand for appraisal is made but who thereafter transfers those shares
          prior to the  effectiveness  of the  merger  will  lose  any  right to
          appraisal in respect of those shares.

     Voting  against,  abstaining  from  voting  on or  failing  to  vote on the
proposal to adopt the merger  agreement will not constitute a written demand for
appraisal  within the meaning of Section 262. The written  demand for  appraisal
must be in addition  to, and  separate  from,  any proxy you deliver or vote you
cast in person.

     Only a holder of record of  shares of common  stock is  entitled  to assert
appraisal rights for those shares registered in that holder's name. A demand for
appraisal should:

     (1)  be executed by or on behalf of the  stockholder  of record,  fully and
          correctly, as its name appears on those stock certificates, and

     (2)  specify the following:

          o  the stockholder's name and mailing address,

          o  the number of shares of common stock owned by the stockholder, and

          o  that  the  stockholder  intends  thereby to demand appraisal of its
             common stock.

     If the shares are owned of record by a person in a fiduciary capacity, such
as a trustee,  guardian  or  custodian,  the demand  should be  executed in that
capacity.  If the  shares are owned of record by more than one  person,  as in a
joint  tenancy  or tenancy in common,  the demand  should be  executed  by or on
behalf of all owners. An authorized  agent,  including one or more joint owners,
may execute a demand for  appraisal  on behalf of a  stockholder;  however,  the
agent must identify the record owner or owners and  expressly  disclose the fact
that,  in executing  the demand,  the agent is acting as agent for such owner or
owners. A record holder such as a broker who holds shares as nominee for several
beneficial owners may exercise  appraisal rights with respect to the shares held
for one or more beneficial owners while not exercising these rights with respect
to the shares held for one or more other  beneficial  owners.  In this case, the
written  demand  should set forth the number of shares as to which  appraisal is
sought, and where no number of shares is expressly  mentioned the demand will be
presumed to cover all shares held in the name of the record owner.  STOCKHOLDERS
WHO HOLD THEIR SHARES IN BROKERAGE  ACCOUNTS OR OTHER NOMINEE FORMS AND WHO WISH
TO  EXERCISE  APPRAISAL  RIGHTS  ARE URGED TO  CONSULT  WITH  THEIR  BROKERS  TO
DETERMINE  APPROPRIATE  PROCEDURES  FOR THE MAKING OF A DEMAND FOR  APPRAISAL BY
SUCH NOMINEE.

     A stockholder who elects to exercise  appraisal  rights pursuant to Section
262 should mail or deliver a written demand to: International Specialty Products
Inc., 1361 Alps Road, Wayne, New Jersey 07470, Attention: Secretary.

     Within  ten days after the  effectiveness  of the  merger,  ISP must send a
notice as to the effectiveness of the merger to each of our former  stockholders
who has made a written  demand for appraisal in accordance  with Section 262 and
who has not voted to adopt  the  merger  agreement.  Within  120 days  after the
effectiveness  of the  merger,  but  not  after  that  date,  either  ISP or any
stockholder  who has complied  with the  requirements  of Section 262 may file a
petition in the  Delaware  Court of Chancery  demanding a  determination  of the
value of the shares of common stock held by all stockholders demanding appraisal
of their


                                       33


shares.  We are under no  obligation  to, and have no present  intent to, file a
petition for appraisal,  and stockholders  seeking to exercise  appraisal rights
should not  assume  that we will file a petition  or that we will  initiate  any
negotiations  with  respect  to  the  fair  value  of the  shares.  Accordingly,
stockholders  who desire to have their  shares  appraised  should  initiate  any
petitions necessary for the perfection of their appraisal rights within the time
periods and in the manner prescribed in Section 262. Since we have no obligation
to file a  petition,  your  failure to do so within the period  specified  could
nullify your previous written demand for appraisal.

     Under the merger  agreement,  we have agreed to give ISPH prompt  notice of
any demands for appraisal we receive prior to the effective  time.  Prior to the
effective time, ISPH has the right to participate in and direct all negotiations
and proceedings with respect to demands for appraisal under the Delaware General
Corporation Law. Prior to the effective time, we will not, except with the prior
written  consent of ISPH,  make any  payment  with  respect to any  demands  for
appraisal, or offer to settle, or settle or otherwise negotiate, any demands.

     Within 120 days after the effectiveness of the merger, any stockholder that
complies  with the  provisions  of  Section  262 to that  point in time  will be
entitled to receive from us, upon written request, a statement setting forth the
aggregate  number of shares not voted in favor of the merger  agreement and with
respect to which we have received demands for appraisal and the aggregate number
of holders of those shares.  We must mail this  statement to the  stockholder by
the later of 10 days after  receipt of a request or 10 days after  expiration of
the period for delivery of demands for appraisals under Section 262.

     A stockholder  who timely files a petition for appraisal  with the Delaware
Court of Chancery  must serve a copy upon ISP. ISP must then within 20 days file
with the Delaware Register in Chancery a duly verified list containing the names
and addresses of all  stockholders  who have demanded  appraisal of their shares
and who have not  reached  agreements  with us as to the value of their  shares.
After  notice  to  stockholders  as may be  ordered  by the  Delaware  Court  of
Chancery,  the  Delaware  Court of Chancery is empowered to conduct a hearing on
the petition to determine which  stockholders are entitled to appraisal  rights.
The Delaware  Court of Chancery may require  stockholders  who have  demanded an
appraisal for their shares and who hold stock  represented  by  certificates  to
submit  their  certificates  to the  Register  in Chancery  for  notation on the
certificates  of  the  pendency  of  the  appraisal  proceedings,   and  if  any
stockholder fails to comply with the requirement, the Delaware Court of Chancery
may dismiss the proceedings as to that stockholder.

     After  determining  which  stockholders  are entitled to an appraisal,  the
Delaware Court of Chancery will appraise the "fair value" of their shares.  This
value will  exclude  any element of value  arising  from the  accomplishment  or
expectation of the merger, but will include a fair rate of interest,  if any, to
be paid upon the amount determined to be the fair value. The costs of the action
may be determined  by the Delaware  Court of Chancery and taxed upon the parties
as the  Delaware  Court of  Chancery  deems  equitable.  Upon  application  of a
stockholder, the Delaware Court of Chancery may also order that all or a portion
of the expenses  incurred by any  stockholder  in connection  with the appraisal
proceeding  be charged pro rata against the value of all of the shares  entitled
to  appraisal.  These  expenses  may  include,  without  limitation,  reasonable
attorneys' fees and the fees and expenses of experts.  STOCKHOLDERS  CONSIDERING
SEEKING  APPRAISAL  SHOULD  BE  AWARE  THAT THE FAIR  VALUE OF THEIR  SHARES  AS
DETERMINED  UNDER  SECTION 262 COULD BE MORE THAN,  THE SAME AS OR LESS THAN THE
MERGER  CONSIDERATION  THEY WOULD BE ENTITLED TO RECEIVE  PURSUANT TO THE MERGER
AGREEMENT IF THEY DID NOT SEEK  APPRAISAL OF THEIR SHARES.  STOCKHOLDERS  SHOULD
ALSO BE AWARE THAT INVESTMENT  BANKING  OPINIONS AS TO FAIRNESS FROM A FINANCIAL
POINT OF VIEW ARE NOT NECESSARILY OPINIONS AS TO FAIR VALUE UNDER SECTION 262.

     In determining fair value and, if applicable,  a fair rate of interest, the
Delaware  Court of Chancery is to take into  account all  relevant  factors.  In
WEINBERGER V. UOP, INC., the Delaware  Supreme Court  discussed the factors that
could be  considered  in  determining  fair  value in an  appraisal  proceeding,
stating that "proof of value by any  techniques  or methods  that are  generally
considered  acceptable  in the financial  community and otherwise  admissible in
court"  should  be  considered,   and  that  "fair  price   obviously   requires
consideration of all relevant factors involving the value of a company."

     In WEINBERGER,  the Delaware  Supreme Court stated that "elements of future
value, including the nature of the enterprise, which are known or susceptible of
proof as of the date of the merger and not the  product of  speculation,  may be
considered." Section 262 provides,  however, that fair value is to be "exclusive
of any element of value arising from the  accomplishment  or  expectation of the
merger."

     Any  stockholder  who has duly  demanded an  appraisal in  compliance  with
Section 262 will not, after the effectiveness of the merger, be entitled to vote
the shares  subject to that demand for any purpose or be entitled to the payment
of dividends or other distributions on those shares. However,  stockholders will
be entitled to dividends or other distributions  payable to holders of record of
shares as of a record date prior to the effectiveness of the merger.


                                       34


     Any stockholder may withdraw its demand for appraisal and accept the merger
consideration  by  delivering to ISP a written  withdrawal of the  stockholder's
demands for appraisal.  Any attempt to withdraw made more than 60 days after the
effectiveness  of the  merger  will  require  written  approval  of  ISP  and no
appraisal proceeding before the Delaware Court of Chancery as to any stockholder
shall be dismissed  without the approval of the Delaware Court of Chancery,  and
this approval may be  conditioned  upon any terms the Delaware Court of Chancery
deems just.

     If we do not  approve a  stockholder's  request  to  withdraw  a demand for
appraisal  when the  approval is required or if the  Delaware  Court of Chancery
does not approve the dismissal of an appraisal proceeding, the stockholder would
be entitled to receive only the appraised value determined in any such appraisal
proceeding.  This value could be higher or lower than, or the same as, the value
of the merger consideration.

     Failure to comply  strictly with all of the procedures set forth in Section
262 of the  Delaware  General  Corporation  Law  will  result  in the  loss of a
stockholder's statutory appraisal rights. Consequently,  any stockholder wishing
to exercise appraisal rights is urged to consult legal counsel before attempting
to exercise those rights.

     The Majority  Stockholder and his affiliates,  as the holders of ISP common
stock,  may also elect to have the fair value of their common  stock  judicially
determined by following the procedures  described above.  However,  the Majority
Stockholder  has agreed to vote, or cause to be voted,  all of the shares of ISP
common stock beneficially owned by him, at the time of the stockholder  meeting,
in favor of adoption of the merger  agreement  and has advised us that he has no
intention of exercising appraisal rights with respect to any of its shares.

REGULATORY APPROVALS AND OTHER CONSENTS

     We believe  that there are no  significant  regulatory  approvals  or other
consents required to complete the merger.

THE MERGER AGREEMENT

     CERTIFICATE OF INCORPORATION, BY-LAWS AND DIRECTORS AND OFFICERS OF ISP AS
     THE SURVIVING CORPORATION

     When the merger is completed:

          o    the amended and restated  certificate of  incorporation of ISP as
               in effect  immediately  prior to the effective time of the merger
               will be the amended and restated  certificate of incorporation of
               ISP as the surviving corporation;

          o    the by-laws of ISPH in effect  immediately prior to the effective
               time will be the by-laws of ISP as the surviving corporation;

          o    the  directors of ISP  immediately  prior to the  effective  time
               (other than  Sanford  Kaplan and those  directors  on the special
               committee)  will  be  the  directors  of  ISP  as  the  surviving
               corporation; and

          o    the officers of ISP immediately  prior to the effective time will
               be officers of ISP as the surviving corporation.

     CONVERSION OF COMMON STOCK

     At the effective time of the merger,  each outstanding  share of ISP common
stock will  automatically be converted into the right to receive $10.30 in cash,
without interest, except for:

          o    shares of ISP common  stock  beneficially  owned by the  Majority
               Stockholder,  which will be canceled without any payment,  except
               shares held by charitable organizations,  which will be converted
               into the right to receive $10.30 in cash, without interest;

          o    shares of ISP common  stock that are held in the  treasury of ISP
               or by any subsidiary of ISP,  which will be canceled  without any
               payment; and

          o    shares held by stockholders  validly seeking  appraisal rights in
               accordance with Delaware law.


                                       35


     At the  effective  time,  each  outstanding  share of ISPH stock issued and
outstanding  prior to the  effective  time will be  converted  into one share of
common stock of ISP as the surviving corporation.

     TREATMENT OF STOCK OPTIONS AND RESTRICTED SHARES

     Each  outstanding  option  granted  under ISP's stock  option plans will be
canceled at the  effective  time of the merger,  and in  consideration  for such
cancellation,  ISP as the  surviving  corporation  shall  pay in cash  after the
effective  time to  each  option  holder  the  excess,  if  any,  of the  merger
consideration  over the  option's  exercise  price  multiplied  by the number of
shares of ISP  common  stock  subject  to the  option  immediately  prior to the
effective  time of the  merger.  ISP  will  cause  each  holder  of a  share  of
restricted  ISP common stock to  surrender,  immediately  prior to the effective
time of the merger,  the restricted  shares in exchange for a cash payment in an
amount equal to the merger  consideration,  provided  that the cash payment will
only be  payable at the time when the  vesting  restrictions  on the  restricted
stock would have lapsed if the merger had not  occurred.  Cash  payments made in
exchange for stock options or restricted stock will be made without interest and
will be reduced by any applicable withholding taxes.

     REPRESENTATIONS AND WARRANTIES

     The merger agreement contains various  representations  and warranties made
by ISP to ISPH,  subject to various  qualifications  and limitations,  including
representations and warranties relating to:

     o    ISP's due organization,  valid existence,  good standing and necessary
          corporate power and authority of ISP and its  subsidiaries to carry on
          its business;

     o    the capitalization of ISP;

     o    the accuracy of information  concerning  ISP's  subsidiaries  in ISP's
          Securities and Exchange  Commission  filings and the capitalization of
          these subsidiaries;

     o    the  authorization,  execution,  delivery  and  enforceability  of the
          merger agreement;

     o    the  absence  of  any  required  governmental   consents,   approvals,
          authorization,  or  permits,  except  those  specified  in the  merger
          agreement;

     o    the absence of any  conflicts  between the merger  agreement and ISP's
          amended and restated  certificate of  incorporation  or by-laws,  or a
          material  conflict  with any  applicable  laws and any other  material
          contracts or documents;

     o    the accuracy and adequacy of information  concerning ISP in this proxy
          statement,  any other  document  to be filed with the  Securities  and
          Exchange  Commission  in  connection  with the  merger  and all  other
          filings made by ISP with the Securities and Exchange Commission;

     o    the compliance of ISP with applicable laws;

     o    the  absence of any  litigation  or claims  against  ISP or any of its
          subsidiaries;

     o    the  qualification  of each of ISP's employee  benefit plans and other
          agreements  with  its  employees  under  Section  401 of the  Internal
          Revenue  Code,  and the absence of any payments that would be required
          as a result of the merger;

     o    the absence of any fees owed to brokers or investment  bankers  (other
          than Lehman Brothers) in connection with the merger;

     o    the  absence  of any  material  changes to ISP's  business,  earnings,
          assets,  liabilities,  financial  or other  condition  or  results  of
          operations  from  December  31, 2001 until the  effective  time of the
          merger,  except  for  changes  disclosed  in  ISP's  filings  with the
          Securities and Exchange Commission;

     o    the  absence  of  material  liabilities  or  obligations,   except  as
          disclosed  in  ISP's   filings  with  the   Securities   and  Exchange
          Commission;

     o    the accuracy of information in ISP's financial reports  concerning the
          real property owned or leased by ISP;


                                       36


     o    good and marketable  title to all the properties and assets  reflected
          on  ISP's  balance  sheet  as  being  owned  by  ISP  or  one  of  our
          subsidiaries  or acquired  after the date of the merger  agreement and
          which are material to our business; and

     o    the receipt by the special  committee  of an opinion  from the special
          committee's  financial advisors that the merger consideration is fair,
          from a financial point of view, to ISP's stockholders  (other than the
          Majority Stockholder).

     The merger agreement contains various  representations  and warranties made
by ISPH to ISP, subject to various  qualifications  and  limitations,  including
representations and warranties relating to:

     o    the due  organization,  valid  existence,  good standing and necessary
          corporate power and authority of ISPH to carry on its business;

     o    the capitalization of ISPH;

     o    the  authorization,  execution,  delivery  and  enforceability  of the
          merger agreement;

     o    the  absence  of  any  required  governmental   consents,   approvals,
          authorization  or  permits,  except  those  specified  in  the  merger
          agreement;

     o    the absence of any conflicts  between the merger  agreement and ISPH's
          certificate of incorporation  or by-laws,  any applicable laws and any
          other material contracts or documents;

     o    the  accuracy  and  adequacy  of  information   provided  by  ISPH  in
          connection  with this proxy statement and the related filings with the
          Securities and Exchange Commission;

     o    the absence of any knowledge of any current  intention of the Majority
          Stockholder to sell ISP as of the date of the merger agreement; and

     o    the absence of any knowledge of any breaches or  inaccuracies of ISP's
          representations and warranties contained in the merger agreement.

     CONDUCT OF BUSINESS PENDING THE MERGER

     ISP has agreed that,  prior to the effective time of the merger,  except as
consented  to by ISPH,  neither our board of directors  nor any board  committee
will approve any action that would cause ISP or any of its subsidiaries to:

     o    split, combine or reclassify any capital stock;

     o    make, declare or pay dividends;

     o    repurchase,  redeem or otherwise  acquire any shares of ISP's  capital
          stock;

     o    grant any additional  options,  warrants or restricted  shares, or any
          capital stock or other equity interests;

     o    enter into any voting  agreement or arrangement  regarding its capital
          stock;

     o    incur any  indebtedness  for  borrowed  money or  assume or  guarantee
          indebtedness of any other person, other than in the ordinary course of
          business,  consistent  with  past  practice,  or incur  other  capital
          expenditures, obligations or liabilities, other than those budgeted as
          of the date of the  merger  agreement  or in the  ordinary  course  of
          business, consistent with past practice;

     o    dispose of any material  properties or assets or cancel or release any
          material indebtedness;

     o    make any material investment in any entity, other than in ISP's wholly
          owned  subsidiaries or in the ordinary course of business,  consistent
          with past practice;

     o    enter into,  terminate  or make any  material  change to any  material
          lease,  contract or  agreement,  other than  renewals in the  ordinary
          course of business, consistent with past practice;

     o    increase  compensation  or  benefits  of current or former  employees,
          consultants  or  directors,  other  than  in the  ordinary  course  of
          business,  consistent  with past  practice,  or as  required by law or
          contracts in effect as of the date of the merger agreement;


                                       37


     o    settle any material claim, action or proceeding;

     o    change  accounting  methods or methods of reporting  for tax purposes,
          except as required by changes in GAAP or changes in applicable law;

     o    amend  any   certificate   of   incorporation,   by-laws  or  plan  of
          consolidation, merger or reorganization;

     o    take any intentional actions that would result, or might reasonably be
          expected to result, in any of the representations or warranties of ISP
          not  being  true,  or in  any  conditions  to  the  merger  not  being
          satisfied; or

     o    agree to, commit to, or take any action described above.

     PROXY STATEMENT

     ISP and ISPH agreed to  cooperate  in  preparing  and ISP agreed to file as
soon as  practicable,  this  proxy  statement  and a  transaction  statement  on
Schedule  13E-3  along with any other  filing  required  by the  Securities  and
Exchange Commission or other regulatory authority in connection with the merger.
ISP agreed to use its  reasonable  best efforts to reply to any  Securities  and
Exchange  Commission  comments and promptly mail copies of this proxy  statement
and transaction statement on Schedule 13E-3 to its shareholders after responding
to such comments.  ISP and ISPH agreed to promptly notify one another of receipt
of any Securities and Exchange Commission comments or requests for amendments or
information and supply one another with copies of all correspondence between its
representatives  and the  Securities  and  Exchange  Commission  regarding  such
filings.  If an event occurs prior to the special meeting of  stockholders  that
would require an amendment to this proxy statement or the transaction  statement
on  Schedule  13E-3,  we agreed to  prepare  and mail such an  amendment  to our
stockholders,  provided that no such  amendment  will be made without  providing
ISPH an opportunity to comment on the amendment.

     SPECIAL MEETING; ISP'S BOARD OF DIRECTORS' COVENANT TO RECOMMEND

     ISP agreed to,  consistent  with applicable law, call and hold a meeting of
our  stockholders  as soon  as  practicable  following  the  date of the  merger
agreement for the purpose of voting on the adoption of the merger agreement. ISP
also agreed to include in this proxy statement and in the transaction  statement
on Schedule 13E-3 the  recommendation of our board of directors (acting upon the
recommendation of the special  committee) that our stockholders  (other than the
Majority Stockholder) adopt the merger agreement.

     Neither the board of directors of ISP nor any of its committees  (including
the special  committee) may withdraw,  qualify or modify, or propose publicly to
withdraw,  qualify or modify its approval or  recommendation  of the approval of
the merger  agreement and the  transactions it  contemplates,  or take any other
action  or make any other  statement  in  connection  with the  special  meeting
inconsistent with its  recommendation.  However,  in the event that prior to the
receipt of the necessary approvals by ISP's stockholders,  the special committee
determines in good faith, after receipt of advice from outside counsel, that the
failure to do so would more likely than not constitute a breach of its fiduciary
duties to the  stockholders of ISP (other than the Majority  Stockholder)  under
applicable law, then the board of directors  (acting upon the  recommendation of
the special committee) or the special committee may withdraw, qualify or modify,
or  propose   publicly  to   withdraw,   qualify  or  modify  its   approval  or
recommendation  of the approval of the merger  agreement and the transactions it
contemplates.  Nonetheless, the merger agreement shall still be submitted to the
stockholders of ISP for adoption at the special meeting.

     REASONABLE EFFORTS

     Subject to the terms and conditions provided in the merger agreement,  both
ISP and ISPH agreed to use reasonable  efforts to make, or cause to be made, all
filings necessary,  proper or advisable under applicable laws and regulations to
consummate  and make  effective  the  transactions  contemplated  by the  merger
agreement.  Both ISP and ISPH  agreed to use their  reasonable  best  efforts to
furnish each other with all  information  required for any filings in connection
with the  merger  agreement.  If, at any time  after the  effective  time of the
merger,  any further  action is necessary or desirable to carry out the purposes
of the merger agreement,  including the execution of additional instruments, the
proper  officers and directors of each party to the merger  agreement  agreed to
take all such necessary action.


                                       38


     ACCESS TO INFORMATION

     ISP has  agreed  that  from  the date of the  merger  agreement  until  the
effective time of the merger, we will (i) provide to the officers, stockholders,
attorneys,  financial advisors,  accountants, and other representatives of ISPH,
reasonable  access at all  reasonable  times to the offices,  records and files,
correspondence, audits and properties, as well as to all information relating to
commitments,  contracts,  titles and financial position, or otherwise pertaining
to the business and affairs,  of ISP and our subsidiaries,  (ii) furnish to ISPH
and its stockholders, counsel, financial advisors, auditors and other authorized
representatives  such financial and operating data and other information as such
persons may reasonably  request and (iii)  instruct the  employees,  counsel and
financial  advisors of ISP and our  subsidiaries  to cooperate  with ISPH in its
investigation of the business of ISP and our subsidiaries.

     CONDITIONS TO THE MERGER

     CONDITIONS TO EACH PARTY'S  OBLIGATION.  The obligations of ISP and ISPH to
complete the merger are subject to the satisfaction or waiver on or prior to the
effective time of the merger of the following conditions:

     o   the  merger  and the  merger  agreement  shall  have been  adopted  and
         approved  by the  affirmative  vote of (i) the holders of a majority of
         the outstanding  shares of ISP common stock,  and (ii) the holders of a
         majority  of the shares of ISP common  stock cast either for or against
         the adoption of the merger agreement  (excluding  shares that are owned
         beneficially  or of record by any  officer or director of ISP or ISPH);
         and

     o    the  absence  of any  injunction  or  order  or any  statute,  rule or
          regulation  that would  prevent the  completion  of the merger and the
          absence of any action brought by any governmental authority seeking to
          obtain an  injunction to prevent,  materially  delay,  restructure  or
          otherwise  question  the  transactions   contemplated  by  the  merger
          agreement;

     CONDITIONS TO ISPH'S  OBLIGATION.  The  obligations of ISPH to complete the
merger are subject to the  satisfaction or waiver,  on or prior to the effective
time of the merger, of the following conditions:

     o    the representations and warranties made by ISP in the merger agreement
          must be true and correct as of the date of the merger agreement and as
          of the effective  time,  except such  failures at the  effective  time
          that,  in the  aggregate,  would not  reasonably be expected to have a
          material adverse effect on ISP or consummation of the merger; and

     o    ISP must have performed in all material respects all obligations under
          the  merger  agreement  required  to be  performed  at or prior to the
          effective time.

     CONDITIONS  TO ISP'S  OBLIGATION.  The  obligations  of ISP to complete the
merger are subject to the  satisfaction or waiver,  on or prior to the effective
time of the merger, of the following conditions:

     o    the  representations  and  warranties  made  by  ISPH  in  the  merger
          agreement  must be  true  and  correct  as of the  date of the  merger
          agreement  and  as of the  effective  time  (except  with  respect  to
          representions  and warranties  that speak as of another date),  except
          such failures at the effective time that, in the aggregate,  would not
          reasonably  be  expected  to have a  material  adverse  effect  on the
          consummation of the merger; and

     o    ISPH must have  performed  in all material  respects  all  obligations
          under the merger agreement required to be performed at or prior to the
          effective time.

     TERMINATION OF THE MERGER AGREEMENT

     The merger  agreement may be terminated  and the merger may be abandoned at
any time prior to the effective time of the merger:

     o    by mutual written  consent of ISP (provided that such  termination has
          been approved by the special committee) and ISPH;

     o    by either ISP (provided that such termination has been approved by the
          special  committee)  or  ISPH  if  governmental  entity  of  competent
          jurisdiction issues a final  nonappealable  injunction or other ruling
          permanently enjoining or otherwise prohibiting the merger;


                                       39


     o    by either ISP (provided that such termination has been approved by the
          special committee) or ISPH if the merger is not completed on or before
          May 31, 2003,  unless the failure to complete the merger is due to the
          failure of the party  seeking to  terminate  the merger  agreement  to
          fulfill its obligations under the merger agreement;

     o    by either ISP (provided that such termination has been approved by the
          special   committee)   or  ISPH  if   there   is  a   breach   of  the
          representations,  warranties  or  covenants as set forth in the merger
          agreement on the part of ISP (in the case of  termination  by ISPH) or
          ISPH (in the case of termination by ISP), and that breach is not cured
          in the 30-day period following  written notice to the party committing
          such a breach or cannot be cured prior to May 31, 2003,  provided that
          such breach would  constitute,  individually  or in the aggregate with
          other  breaches,  the failure of the conditions to the obligations set
          forth above;

     o    by either ISP (provided that such termination has been approved by the
          special  committee)  or ISPH if the  special  meeting  is held and the
          stockholders fail to adopt the merger agreement by the requisite votes
          described  above,  provided  that  ISPH  shall  not have the  right to
          terminate under this section if the Majority Stockholder has failed to
          cause the shares  beneficially owned by him at the time of the meeting
          to be voted in favor of the merger; or

     o    by  ISPH  if the ISP  board  of  directors  or the  special  committee
          withdraws,   qualifies  or  modifies  its   recommendation   to  ISP's
          stockholders to adopt the merger agreement, or publicly proposes to do
          so,  or  takes  any  other   action  or  makes  any  other   statement
          inconsistent with that recommendation.

     EFFECT OF TERMINATION

     If the merger  agreement is  terminated  by either ISP or ISPH, as provided
above,  there  will be no  liability  on the  part of ISP,  ISPH or any of their
affiliates,  directors,  officers, employers or stockholders.  However, no party
will be relieved from liability for willful breaches of the merger agreement.

     AMENDMENTS

     The merger  agreement  may be amended by ISP (acting  upon  approval of the
special committee) and ISPH at any time before or after any required approval of
matters presented in connection with the merger by the  stockholders;  provided,
however,  that after any such  approval,  no  amendment  may be made that by law
requires further approval by such stockholders  without such approval (including
the majority of the minority condition).


                                       40


                                  OTHER MATTERS

SECURITY OWNERSHIP OF SPECIFIED BENEFICIAL OWNERS AND MANAGEMENT

     The following table sets forth certain information regarding the beneficial
ownership  of ISP as of  November  22,  2002 by (1) all those known to ISP to be
beneficial  owners  of more  than 5% of our  common  stock,  (2) each  executive
officer  and  director  of ISP  and  ISPH  and (3) all  executive  officers  and
directors of ISP and ISPH as a group.  ISPH currently does not  beneficially own
any ISP common stock.  Unless otherwise  indicated,  the address for each of the
stockholders  listed below is c/o  International  Specialty  Products Inc., 1361
Alps Road, Wayne, New Jersey 07470.



                                                                          NUMBER OF SHARES
                               NAME                                      BENEFICIALLY OWNED               %
                               -----                                       --------------                ---
                                                                                                   
Samuel J. Heyman.................................................           52,567,240(1)(2)             80.7%(1)(2)
Sunil Kumar......................................................              718,048(2)(3)              1.1%(2)(3)
Richard A. Weinberg..............................................              493,326(2)                   *
Susan B. Yoss....................................................              229,350(2) (4)               *
Roger J. Cope....................................................              141,316(2)                   *
Robert Englander.................................................                1,667(2)                   *
Lawrence Grenner.................................................               11,000(2)                   *
Sanford Kaplan...................................................               29,000(2)                   *
Burt Manning.....................................................               31,000(2)                   *
Alan M. Meckler..................................................                1,667(2)                   *
Stephen R. Olsen.................................................              101,100(5)                   *
Paul T. Brady....................................................                    0                      *
Neal E. Murphy...................................................                    0                      *
Stephen E. Post..................................................                    0                      *
All directors and executive officers as a group (14 persons).....           54,324,714(2)                82.9%



-----------------
*    Less than 1%

(1)  Mr.  Heyman  may be deemed to  beneficially  own,  and has sole  voting and
     investment  power in  respect  of,  52,328,040  of these  shares  through a
     limited  partnership  and  two  limited  liability  companies.  Mr.  Heyman
     disclaims any pecuniary interest in these shares in excess of his interests
     in such entities.

(2)  Includes with respect to Mr. Heyman,  239,200  shares,  Mr. Kumar,  100,000
     shares,  Mr. Weinberg,  414,271 shares,  Ms. Yoss, 69,350 shares, Mr. Cope,
     77,335 shares, Mr. Englander, 1,667 shares, Mr. Grenner, 11,000 shares, Mr.
     Kaplan,  24,000 shares, Mr. Manning,  24,000 shares and Mr. Meckler,  1,667
     shares and all executive officers and directors,  962,490 shares subject to
     options  granted  under  the  1991  Incentive  Plan for Key  Employees  and
     Directors,  as  amended,  of  ISP  and  the  2000  Stock  Option  Plan  for
     Non-Employee Directors of ISP that are currently exercisable or will become
     exercisable within the next 60 days.

(3)  Includes with respect to Mr. Kumar, a grant of 250,000 shares of restricted
     common stock of ISP, 23,449 shares held in ISP's 401(k) plan as of December
     31, 2001,  11,000 shares held by Mr. Kumar's  spouse,  5,000 shares held by
     Mr.  Kumar's  daughter and 100,000  shares in the  aggregate  gifted by Mr.
     Kumar  to  his  children,  as  to  which  Mr.  Kumar  disclaims  beneficial
     ownership.

(4)  Includes with respect to Ms. Yoss, a grant of 150,000  shares of restricted
     common stock of ISP.

(5)  Includes,  with  respect to  Mr. Olsen,  grants of  100,000  shares  in the
     aggregate of restricted common stock of ISP.


                                       41


TRANSACTIONS IN CAPITAL STOCK BY CERTAIN PERSONS

     PURCHASES BY ISP

     The table  below  sets forth  information,  by fiscal  quarters,  regarding
purchases  by ISP of its  common  stock for the past two  years,  including  the
number of shares  purchased on a quarterly  basis, and the high, low and average
price paid.

                                                    PRICE PER SHARE
                         NUMBER OF       ---------------------------------------
                          SHARES           LOW             HIGH         AVERAGE
                         ----------      ---------       ----------    ---------

2002
First Quarter .........    177,600         7.84           9.00            8.42
Second Quarter ........          0           --             --              --
Third Quarter .........          0           --             --              --
Fourth Quarter
  (through November
  26, 2002) ...........          0           --             --              --

2001
First Quarter .........    161,500         6.75           8.25            7.50
Second Quarter ........    312,900         8.00          10.32            9.23
Third Quarter .........    822,500         8.07          10.75            9.83
Fourth Quarter ........    640,900         7.99           8.35            8.29

2000
Fourth Quarter ........  1,273,000        $5.13          $6.38           $5.32

     PURCHASES BY MAJORITY STOCKHOLDER AND HIS AFFILIATES AND ISPH AND ITS
     DIRECTORS AND EXECUTIVE OFFICERS

     Except  for  the  purchases   referred  to  above,  none  of  the  Majority
Stockholder and his affiliates and ISPH and its directors and executive officers
has purchased any shares of ISP common stock during the past two years.

     RECENT TRANSACTIONS

     There have been no  transactions  in shares of ISP common  stock during the
past 60 days by ISP, any of its directors or executive  officers,  ISPH,  any of
its directors or executive  officers,  or the Majority  Stockholder,  except the
following:

          o    in accordance with the merger  agreement,  each of Mr. Kumar, Mr.
               Olsen  and Ms.  Yoss  have  entered  into an  agreement  with ISP
               providing  that  immediately  prior to the effective  time of the
               merger,  their shares of restricted  stock will be surrendered in
               exchange  for the right to receive the cash merger  consideration
               per  share,  subject  to  the  vesting   restrictions   currently
               applicable to their restricted shares;

          o    Mr. Cope (1)  exercised  stock options to acquire 1,219 shares of
               our common  stock on  September  29, 2002,  (2)  exercised  stock
               options to acquire  3,375  shares of our common stock on November
               20,  2002,  and (3) sold 3,375  shares of our common  stock at an
               average price of $9.998 per share on November 20, 2002.

CERTAIN TRANSACTIONS

     STOCKHOLDER VOTING AGREEMENT

     On November  8, 2002,  the  Majority  Stockholder  and ISP  entered  into a
stockholder  voting  agreement,  a copy of which is  included as Annex C to this
proxy  statement.  Pursuant to the stockholder  voting  agreement,  the Majority
Stockholder  agreed,  subject to the terms,  conditions  and  exceptions in that
agreement, to cause the shares of common stock of ISP then beneficially owned by
him at the time of the special meeting (but excluding shares owned by charitable
organizations)  to be voted in favor of adoption of the merger  agreement and to
refrain from transferring shares of ISP common stock pending the merger,  except
with regard to the disposition of up to 114,336 shares of ISP common stock owned
by Heyman Joint Venture II LLC.


                                       42


     INVESTMENT MANAGEMENT ACTIVITIES

     We  conduct  our  investments   business   through  ISP  Investco  and  its
subsidiaries.  We invest primarily in international  and domestic  arbitrage and
securities of companies involved in acquisition or reorganization  transactions.
Those investments  include common stock short positions which are offset against
long positions in securities which are expected,  under specific  circumstances,
to be exchanged or converted into the short  positions.  We generally make these
investments  at the same time and price  that  certain  investment  partnerships
controlled  by the  Majority  Stockholder  and his  family  are  making  similar
investments.  Management of this investment activity is provided by personnel of
investment  partnerships  controlled by the Majority Stockholder and his family,
assisted by certain of our personnel, at no cost or charge to either party.

     MANAGEMENT AGREEMENT

     Pursuant to a management  agreement,  ISP,  through a subsidiary,  provides
certain   general   management,   administrative,   legal,   telecommunications,
information  and  facilities  services  to  Building  Materials  Corporation  of
America, or BMCA, an affiliate of ISP. The management  agreement charges consist
of management fees and other reimbursable  expenses attributable to, or incurred
by ISP for the  benefit  of BMCA and are based on an  estimate  of the costs ISP
incurs to provide  those  services.  ISP and BMCA also allocate a portion of the
management fees payable by BMCA under the management agreement to separate lease
payments  for the use of BMCA's  headquarters.  The  management  agreement  also
provides that ISP pay to a subsidiary of G-I Holdings Inc., an affiliate of ISP,
annual lease  payments for the use of one of ISP's sales  offices.  Based on the
services provided by ISP in 2001 under the management  agreement,  the aggregate
amount payable to ISP under the management  agreement for 2002, net of the lease
payments to a subsidiary of G-I Holdings,  is expected to be approximately  $6.0
million.

     Some of the executive  officers of ISP perform  services for  affiliates of
ISP pursuant to the management  agreement,  and ISP is indirectly reimbursed for
those services by virtue of the management fees and other reimbursable  expenses
payable under the management  agreement.  In this regard,  Mr.  Weinberg and Ms.
Yoss received $500,000 and $300,000, respectively, of additional compensation in
connection with services performed by them for BMCA in 2001. BMCA reimbursed ISP
for these payments pursuant to the management agreement.

     Although,  due to the  unique  nature of the  services  provided  under the
management  agreement,  comparisons with third party arrangements are difficult,
ISP believes that the terms of the management  agreement,  taken as a whole, are
no less  favorable  to ISP than could be  obtained  from an  unaffiliated  third
party.

     CERTAIN OTHER TRANSACTIONS

     In connection with becoming President and Chief Executive Officer of ISP in
June 1999,  Mr.  Kumar was  granted  the right to  purchase,  and did  purchase,
318,599  shares  of  ISP  common  stock  for  an  aggregate  purchase  price  of
$3,046,762.  Under the purchase agreement,  ISP extended a loan to Mr. Kumar the
funds to purchase the shares,  which was evidenced by a recourse promissory note
in the principal  amount of $3,046,762.  The loan was converted to a demand note
and  bears  interest  at the  lowest  applicable  federal  rate  for  short-term
instruments.  The  principal  amount  of the  loan is  payable,  unless  ISP has
previously declared the loan to be due and payable, in four installments on each
June 11 of the years  2001,  2002 and 2003 and on January  11,  2004,  the first
three of which are in the amount of  $761,691  each and the last of which is for
the balance of the then outstanding  principal  amount.  If, however,  Mr. Kumar
remains  continuously  employed by ISP or any of its  subsidiaries  through each
installment  payment date, the principal amount due on such installment  payment
date will be  forgiven.  In addition,  upon the  occurrence  of certain  events,
including  a change of control  of ISP,  the  principal  amount of the loan then
outstanding shall be immediately forgiven. If Mr. Kumar's employment with ISP is
otherwise  terminated for any reason  whatsoever,  the entire principal  balance
outstanding,  together with all interest  accrued,  will be immediately  due and
payable at ISP's election.

     In January  2001,  July 2001,  January 2002 and July 2002, we made loans to
Ms. Yoss in the  principal  amounts of $44,282,  $78,855,  $71,349 and  $57,461,
respectively,  to enable her to satisfy  certain  withholding tax obligations in
connection  with her award of 150,000 shares of restricted  common stock of ISP,
18,750 shares of which vested on each of January 1, 2001, July 1, 2001,  January
1, 2002 and July 1, 2002. The remainder of those shares vest in 12.5% increments
every six months  thereafter  until full vesting on January 1, 2004,  subject to
specified  terms  and  conditions.  Each  loan  bears  interest  at  the  lowest
applicable  federal rate, as it may be adjusted from time to time.  Each loan is
due and payable in full,  together with accrued interest,  on demand and, in any
event, not later than April 15, 2003.


                                       43



FUTURE STOCKHOLDER PROPOSALS

     Due to the contemplated  consummation of the merger, ISP does not currently
expect to hold a public 2003 annual meeting of stockholders  because,  following
the  merger,  ISP will not be a  publicly  held  company.  If the  merger is not
consummated for any reason,  proposals of stockholders intended to be considered
for inclusion in the proxy statement for presentation at the 2003 Annual Meeting
of  Stockholders  must be received by ISP in writing at its principal  executive
offices on or before December 13, 2002 (or, if the date of the annual meeting is
changed by more than 30 days from May 16,  2002,  a  reasonable  time before ISP
begins to print and mail its proxy  materials).  All proposals  received will be
subject to the applicable rules of the Securities and Exchange Commission.  With
regard to  stockholders  who  intend to present a  proposal  at the 2003  Annual
Meeting of Stockholders  without including the proposal in ISP's proxy statement
and fail to submit the proposal on or before  February 26, 2003 (or, if the date
of the  annual  meeting is  changed  by more than 30 days from May 16,  2002,  a
reasonable time before ISP mails its proxy materials), then the persons named as
proxies in ISP's proxy card accompanying the proxy statement for the 2003 Annual
Meeting  of  Stockholders  will be  allowed  to use their  discretionary  voting
authority when the proposal is raised at the meeting,  without any discussion of
the matter in ISP's proxy statement for the 2003 Annual Meeting of Stockholders.

INDEPENDENT AUDITORS

     The  consolidated  financial  statements of ISP  incorporated in this proxy
statement by  reference  to ISP's Annual  Report on Form 10-K for the year ended
December 31, 2001,  have been  incorporated  in reliance on the report of Arthur
Andersen LLP, independent accountants.

     On June 20, 2002, the Board of Directors of ISP, upon the recommendation of
its audit  committee,  decided not to renew the  engagement  of its  independent
auditors, Arthur Andersen, and selected KPMG LLP as its independent auditors for
the  fiscal  year  ending  December  31,  2002.  The change in  auditors  became
effective June 21, 2002. It is not  anticipated  that a  representative  of KPMG
will attend the special meeting.


                                       44


                       WHERE YOU CAN FIND MORE INFORMATION

     ISP files annual, quarterly and current reports, proxy statements and other
information with the Securities and Exchange  Commission.  Stockholders may read
and copy any document  ISP files at the  Securities  and  Exchange  Commission's
public  reference  rooms in  Washington,  D.C.,  New York, New York and Chicago,
Illinois.  Please call the Securities and Exchange  Commission at 1-800-SEC-0330
for further  information on the public reference  rooms.  ISP's filings with the
Securities  and  Exchange  Commission  are also  available  to the public at the
Securities and Exchange  Commission's website at  http://www.sec.gov.  Copies of
documents  filed by ISP with the  Securities  and Exchange  Commission  are also
available at the offices of The New York Stock  Exchange,  20 Broad Street,  New
York, New York 10005.

     ISP and ISPH have filed a transaction  statement on Schedule 13E-3 with the
Securities and Exchange  Commission with respect to the merger.  As permitted by
the  Securities  and Exchange  Commission,  this proxy  statement  omits certain
information  contained  in the  transaction  statement  on Schedule  13E-3.  The
transaction  statement on Schedule 13E-3,  including any amendments and exhibits
filed or  incorporated by reference as a part of it, is available for inspection
or copying as set forth above.  Statements  contained in this proxy statement or
in any document  incorporated in this proxy statement by reference regarding the
contents of any contract or other document are not necessarily complete and each
such  statement is  qualified  in its entirety by reference to such  contract or
other document filed as an exhibit with the Securities and Exchange Commission.

     The  Securities  and  Exchange  Commission  allows  ISP to  incorporate  by
reference into this proxy statement  documents ISP files with the Securities and
Exchange Commission.  This means that ISP can disclose important  information by
referring  to those  documents.  The  information  incorporated  by reference is
considered to be a part of this proxy statement,  and later information that ISP
files with the Securities and Exchange Commission will update and supersede that
information.  ISP  incorporates by reference the documents  listed below and any
documents  filed by ISP  pursuant to Section  13(a),  13(c),  14 or 15(d) of the
Exchange Act after the date of this proxy  statement  and before the date of the
special meeting:

     o    ISP's Annual Report on Form 10-K for the year ended December 31, 2001;

     o    ISP's Quarterly  Reports on Form 10-Q for the quarters ended March 30,
          2002, June 30, 2002 and September 29, 2002; and

     o    ISP's  Current  Reports on Form 8-K dated June 20,  2002,  November 7,
          2002 and November 12, 2002.

     ISP  stockholders  may  request  a copy of the  documents  incorporated  by
reference into this proxy statement by writing to or telephoning ISP.

     Requests for documents should be directed to:

     Stockholder Relations Department
     International Specialty Products Inc.
     1361 Alps Road
     Wayne, New Jersey 07470
     Telephone: (800) 526-5315

     If you would like to request documents from ISP, please do so at least five
business days before the date of the special  meeting in order to receive timely
delivery of those documents prior to the special meeting.

     This proxy statement does not constitute the solicitation of a proxy in any
jurisdiction to or from any person to whom or from whom it is unlawful to make a
proxy  solicitation in that jurisdiction.  ISP stockholders  should rely only on
the  information  contained or incorporated by reference in this proxy statement
to vote their shares at the special  meeting.  ISP has not authorized  anyone to
provide  stockholders  with information that is different from what is contained
in this proxy  statement.  This proxy statement is dated __________ ___ , 200__.
Stockholders  should not assume  that the  information  contained  in this proxy
statement  is accurate  as of any date other than that date,  and the mailing of
this proxy  statement to  stockholders  does not create any  implication  to the
contrary.


                                       45


                                                                         ANNEX A



                          AGREEMENT AND PLAN OF MERGER

                                     BETWEEN

                             INTERNATIONAL SPECIALTY
                                  PRODUCTS INC.

                                       AND

                             INTERNATIONAL SPECIALTY
                             PRODUCTS HOLDINGS INC.

                                NOVEMBER 8, 2002








                                TABLE OF CONTENTS

                                                                           PAGE

                                    ARTICLE I
                                   THE MERGER


SECTION 1.01      The Merger .............................................  A-1

SECTION 1.02      Effective Time; Closing ................................  A-1

SECTION 1.03      Effect of the Merger ...................................  A-2

SECTION 1.04      Certificate of Incorporation; Bylaws ...................  A-2

SECTION 1.05      Directors and Officers. ................................  A-2

                                   ARTICLE II
                            CONVERSION OF SECURITIES;
                       EXCHANGE OF CERTIFICATES; DEPOSIT;
                              DISCLOSURE SCHEDULES


SECTION 2.01      Effect on Capital Stock ................................  A-2

SECTION 2.02      Payment Procedures .....................................  A-3

SECTION 2.03      Company Stock Options; Company Restricted Stock Plans ..  A-3

SECTION 2.04      Shares of Dissenting Stockholders ......................  A-4

SECTION 2.05      Adjustment of Merger Consideration .....................  A-4

                                   ARTICLE III
                  REPRESENTATIONS AND WARRANTIES OF THE COMPANY


SECTION 3.01      Organization ...........................................  A-4

SECTION 3.02       Capitalization ........................................  A-5

SECTION 3.03      Subsidiaries ...........................................  A-5

SECTION 3.04      Authority Relative to This Agreement ...................  A-5

SECTION 3.05      Consents and Approvals; No Violation ...................  A-5

SECTION 3.06      Proxy Statement; Transaction Statement .................  A-5

SECTION 3.07      SEC Documents ..........................................  A-6

SECTION 3.08      Compliance with Laws ...................................  A-6

SECTION 3.09      Litigation and Claims ..................................  A-6

SECTION 3.10      Employees and Employee Plans ...........................  A-6

SECTION 3.11      No Brokers .............................................  A-6

SECTION 3.12      Absence of Certain Changes .............................  A-7

SECTION 3.13      Absence of Undisclosed Liabilities .....................  A-7

SECTION 3.14      Title to Properties and Related Matters ................  A-7

SECTION 3.15      Fairness Opinion .......................................  A-7


                                       i



                                   ARTICLE IV
                     REPRESENTATIONS AND WARRANTIES OF ISPH


SECTION 4.01      Organization ...........................................   A-7

SECTION 4.02      Capitalization .........................................   A-7

SECTION 4.03      Authority Relative to this Agreement ...................   A-7

SECTION 4.04      Consents and Approvals; No Violation ...................   A-7

SECTION 4.05      Proxy Statement ........................................   A-8

SECTION 4.06      No Current Intention to Sell Company ...................   A-8

SECTION 4.07      No Knowledge of Breach or Inaccuracy ...................   A-8

                                    ARTICLE V
                                    COVENANTS

SECTION 5.01      Certain Actions Pending Merger .........................   A-8

SECTION 5.02      Proxy Statement ........................................   A-9

SECTION 5.03      Stockholders' Meeting ..................................  A-10

SECTION 5.04      Reasonable Efforts .....................................  A-10

SECTION 5.05      Inspection of Records ..................................  A-10

SECTION 5.06      Notification of Certain Matters ........................  A-11

SECTION 5.07      Public Announcements ...................................  A-11

SECTION 5.08      Indemnification by Surviving Corporation ...............  A-11

                                   ARTICLE VI
           CONDITIONS TO EACH PARTY'S OBLIGATION TO EFFECT THE MERGER

SECTION 6.01      Stockholder Approval of Agreement ......................  A-12

SECTION 6.02      Certain Proceedings ....................................  A-12

                                   ARTICLE VII
                        CONDITIONS TO OBLIGATIONS OF ISPH

SECTION 7.01      Representations and Warranties True ....................  A-12

SECTION 7.02      Performance of Obligations .............................  A-12

                                  ARTICLE VIII
                    CONDITIONS TO OBLIGATIONS OF THE COMPANY

SECTION 8.01      Representations and Warranties True ....................  A-13

SECTION 8.02      Performance of Obligations .............................  A-13

                                   ARTICLE IX
                        TERMINATION, AMENDMENT AND WAIVER

SECTION 9.01      Termination ............................................  A-13

SECTION 9.02      Effect of Termination ..................................  A-13

SECTION 9.03      Amendment ..............................................  A-14

SECTION 9.04      Extension; Waiver ......................................  A-14


                                       ii


                                    ARTICLE X
                               GENERAL PROVISIONS


SECTION 10.01     Non-Survival of Representations, Warranties and
                    Agreements ...........................................  A-14

SECTION 10.02     Expenses ...............................................  A-14

SECTION 10.03     Notices ................................................  A-14

SECTION 10.04     Definitions and Usage ..................................  A-15

SECTION 10.05     Accounting Terms .......................................  A-16

SECTION 10.06     Disclosure Schedules ...................................  A-16

SECTION 10.07     Severability ...........................................  A-16

SECTION 10.08     Entire Agreement; Assignment ...........................  A-16

SECTION 10.09     Parties in Interest ....................................  A-16

SECTION 10.10     Specific Performance ...................................  A-16

SECTION 10.11     Governing Law ..........................................  A-17

SECTION 10.12     Headings ...............................................  A-17

SECTION 10.13     Counterparts ...........................................  A-17

SECTION 10.14     Construction ...........................................  A-17

SECTION 10.15     No Pecuniary Interest ..................................  A-17


                                      iii


                             INDEX OF DEFINED TERMS

Adverse Company Board
   Recommendation .........................................................   16
Agreement .................................................................    1
Balance Sheet .............................................................    9
beneficial owner ..........................................................   24
business day ..............................................................   25
Cap .......................................................................   19
Certificate ...............................................................    4
Certificate of Merger .....................................................    2
Charitable Organization ...................................................   25
Closing ...................................................................    2
Closing Date ..............................................................    2
Code ......................................................................   25
Company ...................................................................    1
Company Common Stock ......................................................    1
Company Disclosure Schedules ..............................................   26
Company Equity Plans ......................................................    6
Company Meeting ...........................................................   16
Company Plans .............................................................   10
Company Preferred Stock ...................................................    1
Company Reports ...........................................................    9
Company Stock Option Plans ................................................    5
Company Stock Plans .......................................................    6
DGCL ......................................................................    1
Dissenting Shares .........................................................    6
Effective Time ............................................................    2
ERISA .....................................................................   10
Exchange Act ..............................................................    8
Exchange Fund .............................................................    4

GAAP ......................................................................   10
Governmental Entity .......................................................   10
including .................................................................   25
ISPH ......................................................................    1
ISPH Stock ................................................................    1
Knowledge .................................................................   26
Liens .....................................................................    8
Majority Stockholder ......................................................    1
Majority Stockholder Shares ...............................................    1
Majority-of-Minority Condition ............................................   20
Material Adverse Effect ...................................................   25
Merger ....................................................................    1
Merger Consideration ......................................................    4
Option ....................................................................    5
Option Spread .............................................................    6
Options ...................................................................    5
Paying Agent ..............................................................    4
person ....................................................................   26
Proxy Statement ...........................................................   16
Restricted Share ..........................................................    6
SEC .......................................................................    9
Securities Act ............................................................    9
Significant Subsidiary ....................................................   26
Special Committee .........................................................    1
Special Committee Financial Advisor .......................................   11
Subsidiary ................................................................   26
Surviving Corporation .....................................................    2
Transaction Statement .....................................................   16
Voting Agreement ..........................................................    2


                                       iv

                        AGREEMENT AND PLAN OF MERGER

     This  AGREEMENT  AND PLAN OF  MERGER,  dated as of  November  8, 2002 (this
"AGREEMENT"),  is by  and  between  International  Specialty  Products  Inc.,  a
Delaware  corporation  (the  "COMPANY")  and  International  Specialty  Products
Holdings Inc., a Delaware corporation ("ISPH").

                                    RECITALS

     WHEREAS,  the  Company has  authority  to issue (i)  300,000,000  shares of
Common Stock, par value $0.01 per share (the "COMPANY COMMON STOCK"), 65,105,602
of which were outstanding as of November 6, 2002, and (ii) 20,000,000  shares of
Preferred Stock (the "COMPANY PREFERRED STOCK"), none of which are outstanding;

     WHEREAS, Samuel J. Heyman, an individual (the "MAJORITY  STOCKHOLDER"),  is
the  "beneficial  owner" (as defined in Section  10.04) of 52,328,040  shares of
Company  Common Stock,  representing  approximately  80.4% of the Company Common
Stock (the  "MAJORITY  STOCKHOLDER  SHARES"),  and all of the 3,000  outstanding
shares of common stock, par value $0.001 per share (the "ISPH STOCK"), of ISPH;

     WHEREAS,  ISPH is a Delaware corporation formed for the purpose of entering
into this Agreement and consummating the transactions contemplated hereby;

     WHEREAS, the Majority Stockholder has proposed to the Board of Directors of
the  Company  that ISPH be merged  into the  Company in a  transaction  in which
shares of the  Company  beneficially  owned by persons  other than the  Majority
Stockholder  at the time of the  merger  will be  converted  into  the  right to
receive $10.30 per share in cash;

     WHEREAS,  a special  committee  (the "SPECIAL  COMMITTEE")  of the Board of
Directors  of the Company and the Board of  Directors  of the Company  (with the
Majority  Stockholder and Sunil Kumar abstaining) each has determined that it is
fair to, and in the best  interests  of, the  Company and the holders of Company
Common Stock to consummate  the merger (the  "MERGER") of ISPH with and into the
Company upon the terms and subject to the conditions set forth in this Agreement
and in accordance with the Delaware General Corporation Law (the "DGCL");

     WHEREAS, the Board of Directors of ISPH has approved and declared advisable
this  Agreement and the Merger and the other  transactions  contemplated  hereby
upon the terms and subject to the  conditions set forth in this Agreement and in
accordance with the DGCL;

     WHEREAS,  the  Majority  Stockholder  has  agreed,  pursuant  to  a  Voting
Agreement (the "VOTING AGREEMENT") dated as of the date hereof, to vote or cause
to be voted all shares of Company  Common Stock then  beneficially  owned by the
Majority Stockholder in favor of the adoption of the Agreement at any meeting of
stockholders  of the  Company  at which the  Agreement  shall be  submitted  for
adoption and at all adjournments or postponements thereof;

     NOW, THEREFORE,  in consideration of the foregoing and the mutual covenants
and agreements  herein  contained and intending to be legally bound hereby,  the
parties agree as follows:

                                    ARTICLE I
                                   THE MERGER

     SECTION 1.01 THE  MERGER.Upon  the terms and subject to the  conditions set
forth in Articles VI, VII and VIII, and in accordance with the provisions of the
DGCL, at the Effective Time (as defined in Section  1.02),  ISPH shall be merged
with and into the Company.  As a result of the Merger, the separate existence of
ISPH shall cease,  and the Company shall  continue as the surviving  corporation
(the "Surviving Corporation").

     SECTION  1.02  EFFECTIVE  TIME;  CLOSING.The  closing  of the  Merger  (the
"Closing")  shall take place (i) at the  offices of Simpson  Thacher & Bartlett,
425 Lexington Avenue,  New York, New York at 9:00 a.m. New York City time on the
next business day after all of the  conditions set forth in Articles VI, VII and
VIII have been satisfied or, subject to applicable law, waived (other than those
conditions that by their nature are to be satisfied at the Closing,  but subject
to the  satisfaction  or waiver of those  conditions)  in  accordance  with this
Agreement or (ii) at such other place and time and/or on such other date as ISPH
and the  Company  may agree in  writing  (the  "Closing  Date").  Subject to the
provisions of this  Agreement,  as soon as  practicable on the Closing Date, the
parties hereto shall file a certificate of merger (the  "Certificate of Merger")
with the  Secretary  of  State of the  State  of  Delaware,  in such  form as is
required by, and executed in accordance with, the DGCL. The term "Effective


                                      A-1


     Time" means the date and time that the Merger shall become effective, which
shall be the date and time of the filing of the  Certificate  of Merger with the
Secretary of State of the State of Delaware (or such later time as may be agreed
by the parties hereto and specified in the Certificate of Merger).

     SECTION 1.03 EFFECT OF THE MERGER.At the Effective  Time, the effect of the
Merger shall be as provided in the  applicable  provisions of the DGCL.  Without
limiting the generality of the foregoing,  and subject thereto, at the Effective
Time, without further act or deed, all the property, rights, privileges,  powers
and  franchises of the Company and ISPH shall vest in the Surviving  Corporation
and all  debts,  liabilities  and duties of each of the  Company  and ISPH shall
become the debts, liabilities and duties of the Surviving Corporation.

     SECTION 1.04 CERTIFICATE OF INCORPORATION; BYLAWS.

     (a) CERTIFICATE OF INCORPORATION. At the Effective Time, the Certificate of
Incorporation  of the Company as in effect  immediately  prior to the  Effective
Time shall be the  Certificate  of  Incorporation  of the Surviving  Corporation
until  thereafter  amended in  accordance  with its terms and as provided by the
DGCL.

     (b)  BYLAWS.  At the  Effective  Time,  the  Bylaws  of ISPH  as in  effect
immediately  prior to the  Effective  Time shall be the Bylaws of the  Surviving
Corporation  until  thereafter  amended in  accordance  with their  terms and as
provided  by the DGCL and the  Certificate  of  Incorporation  of the  Surviving
Corporation.

     SECTION 1.05 DIRECTORS AND OFFICERS.

     (a)  DIRECTORS.  From and after the  Effective  Time,  the directors of the
Company  immediately  prior to the Effective Time (other than Sanford Kaplan and
those  directors  on  the  Special  Committee)  shall  be the  directors  of the
Surviving Corporation until the earlier of their resignation or removal or until
their respective successors are duly elected and qualified,  as the case may be,
in accordance with the Certificate of Incorporation  and Bylaws of the Surviving
Corporation, the DGCL and this Agreement.

     (b)  OFFICERS.  From and after the  Effective  Time,  the  officers  of the
Company  immediately  prior to the  Effective  Time shall be the officers of the
Surviving  Corporation  and  shall  hold  office  until  the  earlier  of  their
resignation or removal or until their  respective  successors are duly appointed
and  qualified,  as the case may be,  in  accordance  with  the  Certificate  of
Incorporation  and  Bylaws  of the  Surviving  Corporation,  the  DGCL  and this
Agreement.

                                   ARTICLE II
                            CONVERSION OF SECURITIES;
                       EXCHANGE OF CERTIFICATES; DEPOSIT;
                              DISCLOSURE SCHEDULES

     SECTION 2.01 EFFECT ON CAPITAL STOCK.As of the Effective Time, by virtue of
the Merger  and  without  any  action on the part of the  holder of any  Company
Common Stock or any shares of ISPH Stock:

     (a) CONVERSION OF COMPANY COMMON STOCK.  Each share of Company Common Stock
issued and outstanding  immediately  prior to the Effective Time (other than (i)
Dissenting  Shares (as defined in Section  2.04),  (ii) shares of Company Common
Stock that are held in the treasury of the Company or by any  Subsidiary  of the
Company and (iii) shares of Company Common Stock then beneficially  owned by the
Majority Stockholder  (collectively,  the "EXCLUDED SHARES")) shall be converted
into the right to receive  from the  Surviving  Corporation  $10.30 in cash (the
"MERGER   CONSIDERATION")   without  interest  thereon  upon  surrender  of  the
certificate  previously  representing  such  share of  Company  Common  Stock as
provided in Section  2.02(c).  As of the Effective  Time,  all shares of Company
Common Stock shall cease to be outstanding and shall  automatically  be canceled
and  shall  cease  to  exist,  and  each  certificate  (a  "CERTIFICATE")  which
immediately  prior to the Effective Time  represented  any such share of Company
Common  Stock  (except  Excluded  Shares)  shall  cease to have any rights  with
respect thereto,  except the right to receive the Merger  Consideration  and any
dividends or other  distributions to which holders become entitled in accordance
with this Article II upon the surrender of such Certificate.

     (b)  CANCELLATION  OF  EXCLUDED  SHARES.  The  Excluded  Shares  issued and
outstanding  immediately  prior to the  Effective  Time  shall be  canceled  and
retired and shall  cease to exist  without any  consideration  payable  therefor
(subject, in the case of any Dissenting Shares, to such rights as exist pursuant
to the DGCL and Section 2.04).

     (c)  CONVERSION  OF ISPH  STOCK.  Each  share of ISPH  Stock (or a fraction
thereof) issued and  outstanding  immediately pri or to the Effective Time shall
be converted  into one share of Common  Stock,  par value $0.001 per share (or a
fraction thereof), of the Surviving Corporation.


                                      A-2


     SECTION 2.02 PAYMENT  PROCEDURES.  At and after the  Effective  Time,  each
Certificate  formerly  representing  shares of Company  Common Stock (other than
Excluded   Shares)  shall  represent  only  the  right  to  receive  the  Merger
Consideration, without interest.

     (b) From time to time after the Effective  Time, the Surviving  Corporation
shall  deposit,  or cause to be  deposited,  with a bank or trust  company  (the
"PAYING AGENT"),  for the benefit of the holders of the  Certificates,  funds in
such amounts as are  necessary to make the  payments  required  pursuant to this
Article II in exchange for shares of Company  Common Stock (other than  Excluded
Shares).  Any cash deposited with the Paying Agent shall hereinafter be referred
to as the "EXCHANGE FUND."

     (c) As promptly as  practicable  after the  Effective  Time,  the Surviving
Corporation shall send or cause to be sent to each holder of record of shares of
Company Common Stock (other than Excluded Shares) transmittal  materials for use
in  exchanging   Certificates  for  the  Merger  Consideration.   The  Surviving
Corporation  shall  cause  any  check in  respect  of the  Merger  Consideration
(together  with any dividends or other  distributions  to which  holders  become
entitled in accordance with this Article II upon surrender of such  Certificate)
which such person  shall be entitled to receive to be  delivered  to such person
upon delivery to the Paying Agent of  Certificates  formerly  representing  such
shares of Company Common Stock owned by such person.  In the event of a transfer
of ownership of the shares of Company Common Stock that is not registered in the
transfer records of the Company,  payment may be made to a person other than the
person in whose name the  Certificate  so  surrendered  is  registered,  if such
Certificate  shall be  properly  endorsed  or  otherwise  be in proper  form for
transfer and the person  requesting such payment shall pay any transfer or other
taxes  required by reason of the payment to a person  other than the  registered
holder of such  Certificate  or establish to the  satisfaction  of the Surviving
Corporation  that such tax has been paid or is not applicable.  No interest will
be paid on any  such  cash to be paid  pursuant  to this  Article  II upon  such
delivery.  The  Surviving  Corporation  shall be entitled to deduct and withhold
from the Merger  Consideration  otherwise  payable to any holder of Certificates
such amounts (if any) as the Surviving Corporation determines are required to be
deducted or withheld under the Code, or any provision of United States, state or
local tax law or any foreign tax law  applicable  as a result of the  residence,
location,  domicile or other facts  relating to such holder.  To the extent that
amounts are so withheld by the  Surviving  Corporation,  such  withheld  amounts
shall be treated for all  purposes of this  Agreement as having been paid to the
holder of such Certificates.

     (d) Subject to Section  2.04,  at the  Effective  Time,  holders of Company
Common Stock shall cease to be, and shall have no rights as, stockholders of the
Company,  other than to receive any dividend or other  distribution with respect
to the Company Common Stock with a record date occurring  prior to the Effective
Time and payment of the Merger Consideration. From and after the Effective Time,
there shall be no transfers on the stock transfer  records of the Company of any
shares of the Company Common Stock that were  outstanding  immediately  prior to
the Effective Time. If, after the Effective Time,  Certificates are presented to
the  Surviving  Corporation  or the  Paying  Agent for  transfer,  they shall be
canceled  and  exchanged  for the Merger  Consideration  deliverable  in respect
thereof  pursuant to this Agreement in accordance  with the procedures set forth
in this Section 2.02 together with any dividends or other distributions to which
the  holder  becomes  entitled  in  accordance  with  this  Article  II upon the
surrender of such Certificates.

     (e) In the event any Certificate shall have been lost, stolen or destroyed,
upon the  making  of an  affidavit  of that  fact by the  person  claiming  such
Certificate to be lost, stolen or destroyed and, if required by the Paying Agent
or the  Surviving  Corporation,  the  posting  by such  person of a bond in such
amount as the Paying Agent or the Surviving Corporation may reasonably direct as
indemnity  against  any claim that may be made  against it with  respect to such
Certificate,  the Paying Agent or the Surviving Corporation, as the case may be,
shall issue in  exchange  for such lost,  stolen or  destroyed  Certificate  the
applicable Merger Consideration  deliverable in respect thereof pursuant to this
Agreement  and any  dividends or other  distributions  to which  holders  become
entitled  in  accordance  with  this  Article  II  upon  the  surrender  of such
Certificate.

     SECTION 2.03 COMPANY STOCK  OPTIONS;  COMPANY  RESTRICTED  STOCK  PLANS.(a)
STOCK OPTIONS.  The Company shall take all actions necessary to provide that, at
the Effective  Time, each option to purchase a share of Company Common Stock (an
"OPTION" and, collectively, the "OPTIONS") outstanding and unexercised as of the
Effective Time granted pursuant to the 1991 Incentive Plan for Key Employees and
Directors,  the 2000 Stock Option Plan for Non-Employee  Directors and any other
equity-based  plans  or  agreements  of or  with  the  Company  or  any  of  its
Subsidiaries providing for the granting of Options  (collectively,  the "COMPANY
STOCK OPTION PLANS") is canceled, whether or not then exercisable or vested, and
in consideration of such  cancellation,  the Surviving  Corporation shall pay to
the holder of any such Option the excess (rounded to the nearest $0.01), if any,
of the Merger  Consideration  over such  Option's  exercise  price (the  "OPTION
SPREAD")  multiplied by the number of shares of Company  Common Stock subject to
such Option  immediately prior to the Effective Time. All payments made pursuant
to this  Section  2.03(a)  shall  be made  as soon as  commercially  practicable
following the Effective Time, as reduced by any applicable withholding taxes and
other similar charges.


                                      A-3


     (b) RESTRICTED SHARES. The Company shall take any action necessary to cause
each holder of a share of restricted Company Common Stock (a "RESTRICTED SHARE")
outstanding immediately prior to the Effective Time issued pursuant to a Company
Stock Option Plan or any other  equity-based  plans or agreements of or with the
Company or any of its  Subsidiaries  providing  for the  granting of  Restricted
Shares  (collectively,  the "COMPANY EQUITY PLANS" and together with the Company
Stock Option Plans, the "COMPANY STOCK PLANS") to surrender,  immediately  prior
to the Effective Time,  each such Restricted  Share in exchange for the right to
receive an amount in cash equal to the Merger  Consideration,  as reduced by any
applicable  withholding taxes and other similar charges;  PROVIDED that any such
cash  amount  shall only be  payable to such  holder at such time as (and to the
extent that) the vesting  restrictions that were applicable to the corresponding
Restricted Share would have lapsed if not for the Merger.

     (c) As of the Effective  Time,  the Company shall use its  reasonable  best
efforts,  in consultation with ISPH, to remove, or cause to be removed from each
and every plan,  program,  agreement or arrangement any right of any participant
thereunder to invest in, or receive a distribution in, Company Common Stock.

     SECTION 2.04 SHARES OF DISSENTING STOCKHOLDERS.(a) Notwithstanding anything
in this  Agreement to the contrary,  any shares of Company Common Stock that are
issued and  outstanding  as of the Effective  Time and that are held by a holder
who has not voted in favor of the Merger or consented thereto in writing and who
properly  demands  appraisal of such shares pursuant to, and who complies in all
respects with, Section 262 of the DGCL (the "DISSENTING  SHARES"),  shall not be
converted  into the right to receive  the Merger  Consideration  as  provided in
Section 2.01(a),  unless and until such holder shall have failed to perfect,  or
shall have  effectively  withdrawn or lost, his or her right to appraisal  under
the DGCL and instead shall be entitled to receive such  consideration  as may be
determined  to be due with  respect to such  Dissenting  Shares  pursuant to and
subject to the  requirements of Section 262 of the DGCL. If, after the Effective
Time,  any such holder  shall have  failed to perfect or shall have  effectively
withdrawn or lost such right,  each share of such holder's  Company Common Stock
shall thereupon be deemed to have been converted into and to have become,  as of
the  Effective  Time,  the  right  to  receive,  without  interest,  the  Merger
Consideration,  in accordance with Section 2.01(a)  (together with any dividends
or other  distributions  to which  holders of  Certificates  become  entitled in
accordance with this Article II upon the surrender of such Certificates).

     (b) Prior to the  Effective  Time,  the Company  shall give ISPH (i) prompt
notice of any notices or demands  (or  withdrawals  of notices or  demands)  for
appraisal or payment for shares of Company  Common Stock received by the Company
and (ii) the  opportunity  to  participate  in and direct all  negotiations  and
proceedings with respect to any such demands or notices.  Prior to the Effective
Time,  the Company shall not,  without prior written  consent of ISPH,  make any
payments, or settle, offer to settle or otherwise negotiate, with respect to any
such demands.

     (c)  Dissenting  Shares,  if any,  after  payments of fair value in respect
thereof have been made to the holders  thereof  pursuant to the DGCL,  shall, to
the extent not canceled at the Effective Time, be canceled.

     SECTION  2.05  ADJUSTMENT  OF  MERGER  CONSIDERATION.  In the  event  that,
subsequent to the date of this  Agreement but prior to the Effective  Time,  the
outstanding  shares of  Company  Common  Stock  shall have been  changed  into a
different  number of shares of a different  class as a result of a stock  split,
reverse  stock split,  stock  dividend,  subdivision,  reclassification,  split,
combination, exchange, recapitalization or other similar transaction, the Merger
Consideration  and any other  number or amount which is based upon the number of
shares of Company Common Stock shall be appropriately adjusted.

                                   ARTICLE III
                  REPRESENTATIONS AND WARRANTIES OF THE COMPANY

     The Company hereby  represents and warrants to ISPH, except as set forth in
the Company Reports, as follows:

     SECTION 3.01  ORGANIZATION.  The Company is a corporation  duly  organized,
validly  existing and in good standing  under the laws of the State of Delaware,
and,  except  where such failure  would not  reasonably  be expected to,  either
individually  or in the  aggregate,  have a  Material  Adverse  Effect,  has all
requisite corporate power and authority to own, lease and operate its properties
and to carry on its  business  as now  being  conducted.  Each of the  Company's
Subsidiaries is a legal entity duly organized or formed, validly existing and in
good standing under the laws of its jurisdiction, and, except where such failure
would not  reasonably be expected to, either  individually  or in the aggregate,
have a Material Adverse Effect, has all requisite  corporate power and authority
to own,  lease and operate its  properties  and to carry on its  business as now
being conducted.


                                      A-4


     SECTION 3.02 CAPITALIZATION. The capitalization of the Company appearing in
the recitals of this  Agreement  is true and correct as of the date hereof.  All
the issued and  outstanding  shares of Company Common Stock are validly  issued,
fully paid and  nonassessable  and free from preemptive  rights.  Except for the
Options  and  Restricted  Shares set forth in  Schedule  3.02,  (i) there are no
subscriptions,   options,  warrants,  calls,  rights,  contracts,   commitments,
understandings,  restrictions  or arrangements  relating to the issuance,  sale,
transfer or voting of any equity  security of the Company,  including any rights
of conversion or exchange under any outstanding  securities or other instruments
and (ii) there are not any outstanding obligations of the Company to repurchase,
redeem or  otherwise  acquire  any  share of  Company  Common  Stock or make any
material  investment (in the form of a loan, capital  contribution or otherwise)
in any  person.  Schedule  3.02  sets  forth the  aggregate  number of shares of
Company  Common  Stock  reserved  for  issuance  pursuant  to  the  Options  and
Restricted Shares.

     SECTION  3.03  SUBSIDIARIES.  The  Company  Reports  include  a list of all
persons  deemed to be a  material  Subsidiary  of the  Company  or of any of its
Subsidiaries together with each such entity's jurisdiction of organization.  All
of the  outstanding  shares  of  capital  stock or other  securities  evidencing
ownership  of the  Company's  Subsidiaries  are validly  issued,  fully paid and
nonassessable and are owned by the Company or its wholly-owned Subsidiaries free
and  clear  of all  pledges,  claims,  liens,  charges,  options,  encumbrances,
mortgages,  pledges  or  security  interests  of any kind or  nature  whatsoever
(collectively,  "LIENS")  with  respect  thereto,  except  such  Liens  that are
described in the Company Reports.

     SECTION  3.04  AUTHORITY  RELATIVE TO THIS  AGREEMENT.  The Company has the
requisite  corporate  power to enter  into this  Agreement  and to carry out its
obligations  hereunder.  The  execution  and delivery of this  Agreement and the
consummation of the transactions  contemplated  hereby have been duly authorized
by the Board of Directors of the Company and the Special  Committee and,  except
for  the  approval  of  this  Agreement  in  accordance  with  the  DGCL  by the
stockholders of the Company,  no other  corporate  proceeding on the part of the
Company  is  necessary  to  authorize  this   Agreement  and  the   transactions
contemplated  hereby. This Agreement has been duly executed and delivered by the
Company  and  constitutes  a  valid  and  binding   obligation  of  the  Company
enforceable against it in accordance with its terms,  subject to (i) approval in
accordance with the DGCL of the  stockholders of the Company and (ii) applicable
bankruptcy,  insolvency, fraudulent conveyance,  reorganization,  moratorium and
similar laws affecting  creditors' rights and remedies generally and subject, as
to  enforceability,  to general  principles of equity,  including  principles of
commercial  reasonableness,  good faith and fair dealing  (regardless of whether
enforcement is sought in a proceeding at law or in equity).

     SECTION  3.05  CONSENTS  AND  APPROVALS;  NO  VIOLATION.   Except  for  (a)
applicable  requirements of the Securities Exchange Act of 1934, as amended (the
"Exchange  Act"),  (b) filings with various state blue sky  authorities  and (c)
filing and recordation of appropriate  merger  documents as required by the DGCL
and the  corporate  law of the other  states in which the  Company  and ISPH are
qualified  to do  business,  no  filing  with  or  notice  to,  and  no  permit,
authorization, consent or approval of, any public body or Governmental Entity or
any other person,  the absence of which would  reasonably be expected to, either
individually or in the aggregate, have a Material Adverse Effect on the Company,
is necessary for the execution and delivery by the Company of this  Agreement or
the  consummation  by the  Company  of the  transactions  contemplated  by  this
Agreement. Except as set forth in Schedule 3.05, none of the execution, delivery
and  performance  by the Company of this Agreement nor the  consummation  by the
Company of the  transactions  contemplated  hereby nor compliance by the Company
with any of the provisions hereof will (i) conflict with or result in any breach
of any provision of the Certificate of Incorporation or Bylaws of the Company or
similar  governance  or  organizational   documents  of  any  of  the  Company's
Subsidiaries,  (ii) result in a violation or breach of, or  constitute  (with or
without  due  notice  or lapse of time or both) a  default  (or give rise to any
right of termination, amendment, cancellation or acceleration) under, any of the
terms, conditions or provisions of any note, bond, mortgage, indenture, license,
lease agreement or other instrument or obligation to which the Company or any of
its  Subsidiaries is a party or by which the Company or any of its  Subsidiaries
or any of their  respective  properties  or assets may be bound or (iii) violate
any order, writ, injunction,  decree,  statute, rule or regulation applicable to
the Company or any of its Subsidiaries or any of their respective  properties or
assets, except with respect to clauses (ii) and (iii), such violations, breaches
or defaults which would not reasonably be expected to, either individually or in
the aggregate, have a Material Adverse Effect.

     SECTION  3.06  PROXY  STATEMENT;   TRANSACTION   STATEMENT.   None  of  the
information  supplied by the Company for inclusion or incorporation by reference
in (i) the Proxy  Statement (as defined in Section 5.02),  (ii) the  Transaction
Statement (as defined in Section 5.02) or (iii) any other  document  required to
be filed with the SEC or any other  regulatory  authority in connection with the
transactions  contemplated by this Agreement will, at the respective times filed
with the SEC or any other regulatory authority and, in addition,  in the case of
the Proxy  Statement,  the mailing of the Proxy  Statement  or any  amendment or
supplement  thereto, at the time of the meeting of the stockholders to which the
Proxy Statement relates and at the Effective Time,  contain any untrue statement
of a material  fact or omit to state any  material  fact  required  to be stated
therein


                                      A-5


or  necessary  in  order  to  make  the  statements  therein,  in  light  of the
circumstances  under which they are made, not misleading.  The Proxy  Statement,
the Transaction Statement and any other SEC filing in connection with the Merger
will comply (except with respect to ISPH) in all material respects,  as to form,
with  the  applicable  requirements  of the  Exchange  Act  and  the  rules  and
regulations thereunder.

     SECTION 3.07 SEC DOCUMENTS.  Each of the Company and its  Subsidiaries  has
filed all forms, reports,  registration statements, proxy statements,  schedules
and  documents  required  to be  filed by it with the  Securities  and  Exchange
Commission  ("SEC")  since July 31, 2001 through the date hereof  (collectively,
the "COMPANY  REPORTS").  As of their respective  dates, the Company Reports (i)
complied as to form in all material respects with the applicable requirements of
the Securities Act of 1933, as amended (the "SECURITIES  ACT"), the Exchange Act
and the rules and  regulations  thereunder  and (ii) did not  contain any untrue
statement of material  fact  required to be stated  therein or necessary to make
the statements made therein, in light of the circumstances under which they were
made, not misleading.  The most recent consolidated  balance sheet (the "BALANCE
SHEET")  of  the  Company  and  its  consolidated  Subsidiaries  included  in or
incorporated by reference into the Company Reports  (including the related notes
and  schedules)  fairly  presents  the  consolidated  financial  position of the
Company  and its  consolidated  Subsidiaries  as of its  date,  and  each of the
consolidated  statements  of  income,  retained  earnings  and cash flows of the
Company  and  its  consolidated  Subsidiaries  included  in or  incorporated  by
reference into the Company  Reports  (including any related notes and schedules)
fairly presents the  consolidated  results of operations,  retained  earnings or
cash flows, as the case may be, of the Company and its consolidated Subsidiaries
for the periods set forth  therein,  in each case in accordance  with  generally
accepted accounting  principles ("GAAP") consistently applied during the periods
involved,  except as may be noted  therein  (subject,  in the case of  unaudited
interim statements,  to normal and recurring year-end adjustments and exceptions
permitted by Form 10-Q).

     SECTION 3.08 COMPLIANCE WITH LAWS. Each of the Company and its Subsidiaries
has complied and is in compliance  with all  applicable  statutes,  regulations,
rules, orders, ordinances, judgments, decrees, permits, franchises, licenses and
other  laws of the  United  States of  America,  all  state,  local and  foreign
governments and other governmental  bodies and authorities,  and agencies of any
of the foregoing  ("GOVERNMENTAL  ENTITY") to which it is subject, except to the
extent noncompliance would not reasonably be expected to, either individually or
in the aggregate, have a Material Adverse Effect.

     SECTION  3.09   LITIGATION  AND  CLAIMS.   None  of  the  Company  and  its
Subsidiaries  is subject to any  continuing  order of, or written  agreement  or
memorandum of understanding  with, or continuing  material  investigation by any
Governmental Entity or any judgment,  order, writ, injunction,  decree, or award
of any  Governmental  Entity or any court or arbitrator,  and there is no claim,
action, suit, litigation, proceeding, arbitration,  investigation or controversy
affecting  the Company or its  Subsidiaries  or, to the Knowledge (as defined in
Section 10.04) of the Company, threatened, nor is there any valid basis known to
the Company or its Subsidiaries for any such claim,  action,  suit,  litigation,
proceeding,  arbitration,  investigation or controversy except for matters which
would not  reasonably be expected to, either  individually  or in the aggregate,
have a Material Adverse Effect.

     SECTION 3.10 EMPLOYEES AND EMPLOYEE PLANS. (a) Each "employee benefit plan"
(within the meaning of Section 3(3) of the Employee  Retirement  Income Security
Act of 1974,  as amended  ("ERISA")),  and all  severance,  change in control or
employment plans, programs or agreements, and vacation,  incentive, bonus, stock
option, stock purchase, and restricted stock plans, programs or policies and all
other  employee  benefit  plans,  agreements,  programs  or  other  arrangements
sponsored or  maintained  by any of the Company and its  Subsidiaries,  in which
present or former  employees  thereof  participate or any of the Company and its
Subsidiaries  has any present or future  liability  (collectively,  the "COMPANY
PLANS")  that is intended to be  qualified  within the meaning of Section 401 of
the Code has received a favorable  determination letter as to its qualification,
and  nothing  has  occurred  that could  reasonably  be  expected to affect such
qualification.

     (b) Except as provided on Schedule  3.10, no Company Plan exists that could
result in the  payment to any  present or former  employee of any of the Company
and its Subsidiaries of any money or other property or accelerate or provide any
other rights or benefits to any present or former employee of any of the Company
and  its  Subsidiaries  as a  result  of the  transaction  contemplated  by this
Agreement.

     SECTION 3.11 NO BROKERS.  Except pursuant to the engagement  letter (a copy
of which has been  delivered to ISPH)  between the Special  Committee and Lehman
Brothers  Inc.,  financial  advisor  to  the  Special  Committee  (the  "SPECIAL
COMMITTEE  FINANCIAL  ADVISOR"),  no  broker,  finder  or  investment  banker is
entitled to any  brokerage,  finder's  or other  similar  fee or  commission  in
connection with the Merger based upon  arrangements  made by or on behalf of any
of the Company and its Subsidiaries.


                                      A-6


     SECTION 3.12 ABSENCE OF CERTAIN CHANGES. Since December 31, 2001, except as
disclosed in the Company  Reports,  each of the Company and its Subsidiaries has
conducted its business only in the ordinary  course of such business,  and there
has not  been  any  change  in or  effect  on the  business,  earnings,  assets,
liabilities, financial or other condition or results of operations of any of the
Company and its  Subsidiaries  that has had or would  reasonably be expected to,
either individually or in the aggregate, have a Material Adverse Effect.

     SECTION 3.13 ABSENCE OF  UNDISCLOSED  LIABILITIES.  None of the Company and
its  Subsidiaries  has any liabilities or obligations of any nature,  whether or
not accrued,  contingent or otherwise,  whether due or to become due, except (a)
liabilities  or  obligations  reflected or reserved  against or disclosed in the
Company  Reports  filed  prior  to  the  date  hereof  and  (b)  liabilities  or
obligations which would not reasonably be expected to, either individually or in
the aggregate, have a Material Adverse Effect.

     SECTION 3.14 TITLE TO PROPERTIES AND RELATED MATTERS. The Company or one of
its  Subsidiaries  (i) has good and  marketable  title to all the properties and
assets  reflected  in the Balance  Sheet as being owned by the Company or one of
its  Subsidiaries  or acquired  after the date thereof which are material to the
Company's  business on a consolidated basis (except properties sold or otherwise
disposed of since the date thereof in the ordinary course of business), free and
clear of all Liens,  except (A) statutory  Liens securing  payments not yet due,
(B) such imperfections or irregularities of title and Liens as do not materially
affect the use of the properties or assets subject  thereto or affected  thereby
or otherwise  materially  impair business  operations at such properties and (C)
such Liens that are described in the Company Reports,  and (ii) is the lessee of
all leasehold  estates  reflected in the Company  Reports or acquired  after the
date thereof  which are  material to the  Company's  business on a  consolidated
basis  (except  for  leases  that have  expired  by their  terms  since the date
thereof)  and  is in  possession  of  the  properties  purported  to  be  leased
thereunder,  and each such  lease is valid  without  default  thereunder  by the
lessee or, to the  Knowledge of the Company,  the lessor,  except in the case of
clauses  (i) and (ii)  above as would not  reasonably  be  expected  to,  either
individually or in the aggregate, have a Material Adverse Effect.

     SECTION  3.15  FAIRNESS  OPINION.  The Special  Committee  has  received an
opinion of the Special Committee Financial Advisor that the Merger Consideration
is fair,  from a financial point of view, to the Company's  stockholders  (other
than the Majority Stockholder).

                                   ARTICLE IV
                     REPRESENTATIONS AND WARRANTIES OF ISPH

     ISPH hereby represents and warrants to the Company as follows:

     SECTION 4.01  ORGANIZATION.  ISPH is a corporation duly organized,  validly
existing  and in good  standing  under the laws of the State of Delaware and has
all  requisite  corporate  power and  authority  to own,  lease and  operate its
properties and to carry on its business as now being conducted.

     SECTION 4.02  CAPITALIZATION.  The  capitalization of ISPH appearing in the
recitals to this Agreement is true and correct as of the date hereof. All of the
issued and outstanding  shares of ISPH Stock are validly issued,  fully paid and
non-assessable and free from preemptive rights and all of the outstanding shares
of ISPH Stock are beneficially owned by Majority Stockholder.

     SECTION 4.03 AUTHORITY  RELATIVE TO THIS AGREEMENT.  ISPH has the requisite
corporate  power to enter into this  Agreement and to carry out its  obligations
hereunder.  The execution and delivery of this Agreement and the consummation of
the transactions  contemplated  hereby have been duly authorized by the Board of
Directors of ISPH and,  except for the approval of this  Agreement in accordance
with the DGCL by the stockholders of ISPH, no other corporate  proceeding on the
part of ISPH is necessary  to  authorize  this  Agreement  and the  transactions
contemplated hereby. This Agreement has been duly executed and delivered by ISPH
and constitutes a valid and binding obligation of ISPH enforceable against it in
accordance  with its terms,  subject to (i) approval in accordance with the DGCL
of  the  stockholders  of  ISPH  and  (ii)  applicable  bankruptcy,  insolvency,
fraudulent  conveyance,  reorganization,  moratorium  and similar laws affecting
creditors' rights and remedies generally and subject,  as to enforceability,  to
general principles of equity  (regardless of whether  enforcement is sought in a
proceeding at law or in equity).

     SECTION  4.04  CONSENTS  AND  APPROVALS;  NO  VIOLATION.   Except  for  (a)
applicable requirements of the Exchange Act, (b) filings with various state blue
sky authorities and (c) filing and recordation of appropriate  merger  documents
as required by the DGCL and the  corporate  law of the other states in which the
Company and ISPH are qualified to do business, no fil-


                                      A-7


ing with or notice to, and no permit, authorization, consent or approval of, any
public body or  Governmental  Entity,  the absence of which would be  reasonably
expected to, either  individually or in the aggregate,  have a Material  Adverse
Effect on ISPH is  necessary  for the  execution  and  delivery  by ISPH of this
Agreement or the consummation by ISPH of the  transactions  contemplated by this
Agreement.  None of the  execution,  delivery  and  performance  by ISPH of this
Agreement nor consummation by ISPH of the transactions  contemplated  hereby nor
compliance by ISPH with any of the  provisions  hereof will (i) conflict with or
result in any breach of any provision of the  Certificate  of  Incorporation  or
Bylaws of ISPH, (ii) result in a violation or breach of, or constitute  (with or
without  due  notice  or lapse of time or both) a  default  (or give rise to any
right of termination, amendment, cancellation or acceleration) under, any of the
terms, conditions or provisions of any note, bond, mortgage, indenture, license,
lease agreement or other instrument or obligation to which ISPH is a party or by
which ISPH or any of its  properties or assets may be bound or (iii) violate any
order, writ, injunction,  decree, statute, rule or regulation applicable to ISPH
or any of its  properties  or assets,  except with  respect to clauses  (ii) and
(iii), such violations,  breaches or defaults which,  either  individually or in
the  aggregate,  would not be  reasonably  expected  to have a Material  Adverse
Effect on ISPH.

     SECTION 4.05 PROXY  STATEMENT.  None of the  information  supplied or to be
supplied by ISPH for inclusion in (i) the Proxy Statement,  (ii) the Transaction
Statement or (iii) any other  document  required to be filed with the SEC or any
other regulatory  authority in connection with the transactions  contemplated by
this  Agreement,  will at the  respective  times filed with the SEC or any other
regulatory  authority and, in addition,  in the case of the Proxy Statement,  at
the time of the mailing of the Proxy  Statement or any  amendment or  supplement
thereto,  at the time of the  meeting  of the  stockholders  to which  the Proxy
Statement  relates and at the Effective Time,  contain any untrue statement of a
material fact or omit to state any material  fact required to be stated  therein
or  necessary  in  order  to  make  the  statements  therein,  in  light  of the
circumstances  under which they are made, not misleading.  The Proxy  Statement,
the Transaction Statement and any other SEC filing in connection with the Merger
will comply (with respect to ISPH and/or  Majority  Stockholder) in all material
respects, as to form, with the applicable  requirements of the Exchange Act, and
the rules and regulations thereunder.

     SECTION 4.06 NO CURRENT  INTENTION TO SELL COMPANY.  As of the date of this
Agreement and to ISPH's Knowledge,  the Majority Stockholder has no intention to
(i) sell,  transfer or otherwise  dispose of the shares of the capital  stock of
Surviving Corporation;  (ii) sell, lease, assign,  transfer or otherwise dispose
of all or a major portion of its assets; or (iii) consolidate with or merge into
another corporation or permit one or more other corporations to consolidate with
or merge into it or permit one or more other such  corporations  to  consolidate
with or merge into it, except  pursuant to this  Agreement;  but there can be no
assurance that the Majority  Stockholder or the Surviving  Corporation  will not
determine to cause such events in the future.

     SECTION  4.07 NO KNOWLEDGE  OF BREACH OR  INACCURACY.  Neither ISPH nor any
director, officer,  shareholder,  employee or agent of ISPH has Knowledge of any
breach of, or  inaccuracy  in, any of the  representations  or warranties of the
Company  contained in this Agreement,  except such breaches and  inaccuracies as
would not  reasonably be expected to, either  individually  or in the aggregate,
have a Material Adverse Effect.

                                    ARTICLE V
                                    COVENANTS

     SECTION 5.01 CERTAIN ACTIONS  PENDING MERGER.  Prior to the Effective Time,
neither the Board of Directors of the Company nor any  committee  thereof  shall
approve any action that would  result in the Company or any of its  Subsidiaries
taking any of the following actions, except with the consent of ISPH:

     (a) a split,  combination or  reclassification of the outstanding shares of
Company  Common  Stock or a  declaration,  set-aside  or payment of any dividend
payable in cash,  stock or  property  or any  distribution  with  respect to the
outstanding  shares of Company Common Stock or, a redemption,  purchase or other
acquisition (or agreement to redeem, purchase or otherwise acquire), directly or
indirectly, any shares of Company Common Stock;

     (b) an  issuance,  grant or  agreement  to issue  or grant  any  additional
capital stock of the Company or any of its Subsidiaries or any options, warrants
or rights of any kind to  acquire  any shares of any such  capital  stock or any
securities  convertible into or exchangeable for such capital stock or any right
or security the value of which is based on the value of any such capital stock;

     (c) the entering into any  agreement,  understanding  or  arrangement  with
respect to the voting of its capital stock;

     (d) the  incurrence  of (i) any  indebtedness  for  borrowed  money  or the
assumption,   guarantee,  endorsement  or  any  other  accommodation  to  become
responsible  for the  long-term  indebtedness  of any other  person  (other than
deposits and similar liabilities,  indebtedness of the Company's Subsidiaries to
the Company or any of its wholly owned Subsidiaries and indebt-


                                      A-8


edness under existing lines of credit and renewals or extensions thereof), other
than in the ordinary course of business  consistent with past practice,  or (ii)
any capital expenditures,  obligations or liabilities, other than those budgeted
as of the date hereof or in the ordinary course of business consistent with past
practice;

     (e) the sale, transfer,  mortgage,  encumbrance or other disposition of any
of its material properties or assets, including capital stock in any Significant
Subsidiaries  (as defined in Section 10.04) of the Company,  to any person other
than a direct or  indirect  wholly  owned  Subsidiary,  or the  cancellation  or
release of any  indebtedness  to any such  person or any claims held by any such
person,  except (i) sales of  inventory  or  immaterial  assets in the  ordinary
course of business  consistent  with past practice or (ii) pursuant to contracts
or agreements in force at the date of this Agreement;

     (f) except for  transactions in the ordinary course of business  consistent
with past practice,  the making of any material investment either by purchase of
stock or securities,  contributions to capital,  property transfers, or purchase
of any  property  or  assets  of any  other  person  other  than a wholly  owned
Subsidiary;

     (g) except for  transactions in the ordinary course of business  consistent
with past practice,  the entering into, or termination  of, any material  lease,
contract or agreement,  or making of any material  change in any of its material
leases,  contracts or  agreements,  other than renewals of leases,  contracts or
agreements without material changes of terms;

     (h) other than in the  ordinary  course of  business  consistent  with past
practice or as required by law or  contracts in effect as of the date hereof set
forth in Section 3.10 or Schedule  5.01, an increase in any manner of the wages,
salaries,  compensation,  pension or other fringe benefits or perquisites of any
current or former  employees,  consultants or directors of the Company or any of
its  Subsidiaries,  or  the  vesting,  funding  or  payment  of any  pension  or
retirement allowance other than as required by any existing Company Plans to any
such current or former employees, consultants or directors or the entering into,
amendment, termination or commitment to any pension, retirement,  profit-sharing
or welfare  benefit  plan or  agreement or  employment,  severance,  consulting,
retention,  change in control,  termination,  deferred compensation or incentive
pay  agreement  with or for the  benefit  of any  current  or  former  employee,
consultant or director or, except as expressly  contemplated  by this Agreement,
the acceleration of the vesting,  funding or payment of any compensation payment
or benefit;

     (i) the settlement of any material  claim,  action or proceeding  involving
money damages or a waiver or release of any material rights or claims;

     (j) the change in its methods of accounting in effect at December 31, 2001,
except as  required  by  changes in GAAP,  or a change in any of its  methods of
reporting  material  items of income and  deductions for tax purposes from those
employed  in the  preparation  of the tax returns of the Company for the taxable
years ending December 31, 2001 and 2000, except as required by changes in law or
regulation or as set forth in the Company Disclosure Schedules;

     (k) the  adoption or  implementation  of any  amendment  to its articles or
certificate  of  incorporation,  articles  of  association,  by-laws (or similar
documents) or any plan of consolidation, merger or reorganization;

     (l) the taking of any action that would, or would be reasonably  likely to,
result in any of the  representations  or warranties of the Company set forth in
this  Agreement  not  being  true  in  all  material  respects  or in any of the
conditions  to the  Merger  set  forth in  Articles  VI,  VII and VIII not being
satisfied, except, in every case, as may be required by applicable law; or

     (m) the entering into any agreement to, or the making of any commitment to,
take any of the actions prohibited by this Section 5.01.

     SECTION  5.02 PROXY  STATEMENT.  ISPH and the Company  shall  cooperate  in
preparing  and the  Company  shall,  as soon as  practicable,  file with the SEC
(after  providing  ISPH with a  reasonable  opportunity  to review  and  comment
thereon) (i)  preliminary  proxy  materials  relating to the Company Meeting (as
defined in Section 5.03)  (together with any  amendments  thereof or supplements
thereto,  the "PROXY  STATEMENT"),  (ii) the  transaction  statement on Schedule
13E-3  required by the Exchange Act  (together  with any  amendments  thereof or
supplements thereto,  the "TRANSACTION  STATEMENT") and (iii) any other document
required  to be  filed  with  the  SEC  or any  other  regulatory  authority  in
connection with the transaction contemplated by this Agreement and shall use its
reasonable  best efforts to respond to any comments of the SEC (after  providing
ISPH with a reasonable  opportunity to review and comment  thereon) and to cause
the Proxy Statement and the Transaction  Statement to be mailed to the Company's
stockholders as promptly as practicable after responding to all such comments to
the  satisfaction  of the SEC staff.  The Company and ISPH shall promptly notify
one  another of the receipt of any  comments  from the SEC and of any request by
the SEC for amendments or supplements to the Proxy  Statement or the Transaction
Statement or for additional information and shall supply one another with copies
of all  correspondence  between  it and any of its  representatives,  on the one
hand, and the SEC on the other hand,  with respect to the Proxy  Statement,  the
Transaction Statement or the trans-


                                      A-9


actions  contemplated  hereby. If at any time prior to the Company Meeting there
shall occur any event that should be set forth in an amendment or  supplement to
the Proxy  Statement or the  Transaction  Statement,  the Company shall promptly
prepare and (if  appropriate)  mail to its  stockholders  such an  amendment  or
supplement;  provided that no such  amendment or supplement  will be made by the
Company  without  providing ISPH a reasonable  opportunity to review and comment
thereon.

     (b)  Except  under the  circumstances  described  in Section  5.03(b),  the
Company shall include in the Proxy Statement and the  Transaction  Statement the
recommendation   of  the   Company's   Board  of  Directors   (acting  upon  the
recommendation  of the Special  Committee) that the  stockholders of the Company
(other than the Majority Stockholder) adopt this Agreement.

     SECTION 5.03  STOCKHOLDERS'  MEETING.  The Company shall,  consistent  with
applicable  law,  call and hold a  meeting  of its  stockholders  (the  "COMPANY
MEETING") as promptly as  practicable  following the date hereof for the purpose
of voting upon the adoption of this Agreement. The Company, through its Board of
Directors  (acting  upon the  recommendation  of the Special  Committee),  shall
recommend to its stockholders (other than the Majority  Stockholder) adoption of
this  Agreement,  which  recommendation  shall,  except under the  circumstances
described  in Section  5.03(b),  be  contained  in the Proxy  Statement  and the
Transaction Statement.

     (b) Neither the Board of Directors of the Company nor any committee thereof
(including the Special Committee) shall,  except as expressly  permitted by this
Section  5.03(b),  (i)  withdraw,  qualify or modify,  or  propose  publicly  to
withdraw,  qualify or modify its approval or  recommendation  of the approval of
this Agreement and the transactions  contemplated  hereby or (ii) take any other
action  or make any other  statement  in  connection  with the  Company  Meeting
inconsistent with such recommendation  (collectively,  an "ADVERSE COMPANY BOARD
RECOMMENDATION").  Notwithstanding the foregoing, in the event that prior to the
satisfaction of the conditions set forth in Section 6.01, the Special  Committee
determines in good faith, after receipt of advice from outside counsel, that the
failure to do so would more likely than not constitute a breach of its fiduciary
duties to  stockholders  of the Company  (other than the  Majority  Stockholder)
under  applicable  law, then the Board of Directors of the Company  (acting upon
the  recommendation of the Special  Committee) or the Special Committee may make
an Adverse Company Board Recommendation.

     (c)  Notwithstanding  any  Adverse  Company  Board   Recommendation,   this
Agreement  shall be submitted to the  stockholders of the Company at the Company
Meeting for the purpose of adopting this Agreement and nothing  contained herein
shall be deemed to relieve the Company of such obligation.

     SECTION 5.04 REASONABLE EFFORTS. Subject to the terms and conditions herein
provided, each of the parties hereto agrees to (i) use its reasonable efforts to
take,  or cause to be taken,  all  action,  and to do, or cause to be done,  all
things  necessary,  proper or advisable under applicable laws and regulations or
required to be taken by any  Governmental  Entity or otherwise to consummate and
make effective the  transactions  contemplated  by this Agreement as promptly as
practicable,  (ii) obtain from any Governmental  Entity any consents,  licenses,
permits, waivers, approvals, authorizations or orders required to be obtained or
made by ISPH,  the Company or any of the  Company's  Subsidiaries  in connection
with  the  authorization,  execution  and  delivery  of this  Agreement  and the
consummation  of the  Merger,  and (iii) as promptly  as  practicable,  make all
necessary  filings,  and thereafter  make any other required  submissions,  with
respect to this  Agreement and the Merger  required  under (A) the Exchange Act,
and any other  applicable  federal or state  securities  laws, and (B) any other
applicable  law;  PROVIDED that ISPH and the Company shall  cooperate  with each
other in  connection  with the making of all such filings,  including  providing
copies of all such documents to the  non-filing  party and its advisors prior to
filing and, if  requested,  to accept all  reasonable  additions,  deletions  or
changes  suggested  in  connection  therewith.  The  Company  and ISPH shall use
reasonable  best efforts to furnish to each other all  information  required for
any application or other filing to be made pursuant to the rules and regulations
of any applicable law (including all information  required to be included in the
Proxy  Statement  and  the   Transaction   Statement)  in  connection  with  the
transactions  contemplated  by this  Agreement.  In case at any time  after  the
Effective  Time,  any further  action is necessary or desirable to carry out the
purposes  of  this  Agreement,   the  proper  officers  and  directors  of  each
corporation  party to this Agreement  shall take all such necessary or desirable
action.

     SECTION 5.05  INSPECTION OF RECORDS.  From the date hereof to the Effective
Time,  the  Company  shall  (i)  allow all  designated  officers,  stockholders,
attorneys,  financial  advisors,  accountants and other  representatives of ISPH
reasonable  access at all  reasonable  times to the offices,  records and files,
correspondence, audits and properties, as well as to all information relating to
commitments,  contracts,  titles and financial position, or otherwise pertaining
to the business and affairs,  of the Company and its Subsidiaries,  (ii) furnish
to ISPH and its stockholders,  counsel,  financial advisors,  auditors and other
authorized   representatives   such  financial  and  operating  data  and  other
information  as such  persons  may  reasonably  request and (iii)  instruct  the
employees, counsel and financial advisors of the Company and its Subsidiaries to
cooperate with ISPH in its investiga-


                                      A-10


tion of the business of the Company and its  Subsidiaries.  No  investigation by
any party,  whether prior to the execution of this Agreement or pursuant to this
Section 5.05, shall affect any  representation  or warranty in this Agreement of
any party hereto or any condition to the obligations of the parties hereto.

     SECTION 5.06  NOTIFICATION OF CERTAIN  MATTERS.  From and after the date of
this Agreement until the Effective Time, each party hereto shall promptly notify
the other parties hereto of:

     (a) any change or event, or series of changes or events,  having,  or which
would  reasonably  be  expected to have,  individually  or in the  aggregate,  a
Material Adverse Effect on it or would be reasonably  likely to cause any of the
conditions  in  Articles  VI, VII and VIII not to be  satisfied  or to cause the
satisfaction thereof to be materially delayed;

     (b) the receipt of any material notice or other material communication from
any person  alleging  that the  consent of such  person is or may be required in
connection with the transactions contemplated hereby;

     (c) the receipt of any material notice or other material communication from
any Governmental Entity in connection with the transactions contemplated hereby;
and

     (d) any actions, suits, claims, investigations or proceedings commenced or,
to the  Knowledge of the party,  threatened  against  ISPH or the Company  which
seeks to  prohibit  or prevent  consummation  of the  transactions  contemplated
hereby;

in each case,  to the extent such event or  circumstance  is or becomes known to
the party required to give such notice; PROVIDED,  HOWEVER, that the delivery of
any notice  pursuant to this Section 5.06 shall not be deemed to be an amendment
of this Agreement or any of the Company  Disclosure  Schedules,  as the case may
be, and shall not cure any breach of any  representation  or warranty  requiring
disclosure of such matter prior to the date of this Agreement.

     SECTION  5.07 PUBLIC  ANNOUNCEMENTS.  ISPH and the Company  shall use their
reasonable  efforts to consult with each other before  issuing any press release
or otherwise making any public  statements with respect to this Agreement or any
of the  transactions  contemplated  hereby.  Prior to the Closing,  ISPH and the
Company shall not issue any such press release or make any such public statement
without  the prior  consent of the other  parties  (which  consent  shall not be
unreasonably  withheld  or  delayed),  except  as  may  be  required  by  law or
regulation  or any  listing  agreement  with the New York Stock  Exchange or any
other  securities  exchange  to which the  Company is a party and, in such case,
shall use their reasonable  efforts to consult with all the parties hereto prior
to such release or statement  being issued.  The parties shall agree on the text
of a joint press  release by which the parties will  announce  the  execution of
this Agreement.

     SECTION 5.08 INDEMNIFICATION BY SURVIVING  CORPORATION.  (a) From and after
the Effective Time, the Surviving  Corporation shall indemnify,  defend and hold
harmless  each person who is now an officer or  director of the Company  against
all losses,  claims,  damages,  costs,  expenses or liabilities or in connection
with any claim,  action,  suit,  proceeding or investigation  arising out of the
fact that such  person is an officer or  director  of the Company (or out of any
action  taken by any such person on behalf of the  Company),  pertaining  to any
matter  existing or occurring on or prior to the Effective  Time  (including the
transactions contemplated by this Agreement),  whether asserted or claimed prior
to, or on or after, the Effective Time. In each case such indemnification  shall
be to the  full  extent  permitted  under  applicable  law  (and  the  Surviving
Corporation  will pay expenses in advance of the final  disposition  of any such
action or  proceeding  to each such  director or officer of the Company  seeking
indemnification hereunder to the full extent permitted by law).

     (b) For a period  of six years  after the  Effective  Time,  the  Surviving
Corporation shall maintain officers' and directors'  liability insurance for all
persons currently covered under the Company's officers' and directors' liability
insurance  policies,  in their  capacities as officers and  directors,  on terms
substantially  no less  advantageous  to the covered  persons than such existing
insurance,  pertaining  to any matter  existing or  occurring on or prior to the
Effective Time  (including the  transactions  contemplated  by this  Agreement),
whether  asserted  or  claimed  prior  to, or on or after  the  Effective  Time;
provided,  however,  that the  Surviving  Corporation  shall not be  required to
maintain or procure such coverage to pay an annual  premium in excess of 200% of
the current  annual  premium paid by the Company for its existing  coverage (the
"Cap"); and provided,  further,  that if equivalent coverage cannot be obtained,
or can be  obtained  only by paying an annual  premium  in excess of 200% of the
Cap, the Surviving Corporation shall only be required to obtain as much coverage
as can be obtained by paying an annual premium equal to 200% of the Cap.


                                      A-11


     (c) The  Indemnity  Agreements  dated  August 7, 2002 among the Company and
each  of  the   members  of  the   Special   Committee   (the   "Indemnification
Arrangements")  shall not in any way be limited by or be  affected by the rights
and  obligations  of the Company or of the  directors  and  officers  under this
Agreement except as expressly provided herein, and the execution and delivery of
this Agreement  shall not in any way limit or affect the rights and  obligations
of  the  Company  or  the  other  party  or  parties   thereto  under  any  such
Indemnification Arrangement.

     (d) This Section 5.08 shall  survive the  consummation  of the Merger.  The
provisions of this Section 5.08 are intended to be for the benefit of, and shall
be enforceable by the present directors or officers of the Company,  as the case
may be. The rights provided under this Section 5.08 shall be in addition to, and
not in lieu of,  any  rights to  indemnity  which  any party may have  under the
Certificate  of  Incorporation  or  Bylaws  of  the  Company  or  the  Surviving
Corporation or any other agreements.  If the Surviving Corporation or any of its
successors or assigns (i) consolidates with or merges into any other corporation
or entity and is not the  continuing or surviving  corporation or entity of such
consolidation  or  merger  or (ii)  transfers  all or  substantially  all of its
properties or assets to any individual, corporation or any other entity, in each
such case,  proper provision shall be made so that the successors and assigns of
the Surviving Corporation shall assume the obligations set forth in this Section
5.08.

     (e) In the  event  that  any  action,  suit,  proceeding  or  investigation
relating  thereto  or to the  transactions  contemplated  by this  Agreement  is
commenced,  whether before or after the Effective Time, the parties hereto agree
to cooperate and use their respective  reasonable  efforts to vigorously  defend
against and respond thereto.

                                   ARTICLE VI
           CONDITIONS TO EACH PARTY'S OBLIGATION TO EFFECT THE MERGER

     The  respective  obligations  of each party to effect  the Merger  shall be
subject to the  fulfillment  on or prior to the Effective  Time of the following
conditions:

     SECTION 6.01  STOCKHOLDER  APPROVAL OF  AGREEMENT.  This  Agreement and the
transactions  contemplated hereby shall have been adopted by (a) the affirmative
vote of the holders of at least a majority of the outstanding  shares of Company
Common Stock and (b) the affirmative  vote of at least majority of the shares of
Company  Common Stock cast either for or against the adoption of this  Agreement
(excluding  the  Majority  Stockholder  Shares and any shares of Company  Common
Stock held beneficially or of record by any officers or directors of ISPH or the
Company)   (the   affirmative   vote   described   in  this  clause   (b),   the
"MAJORITY-OF-MINORITY CONDITION").

     SECTION 6.02 CERTAIN PROCEEDINGS. No preliminary or permanent injunction or
restraining  order or other  order,  decree  or  ruling  issued  by any court of
competent  jurisdiction  nor any statute,  rule,  regulation  or order  entered,
promulgated or enacted by any Governmental Entity shall be in effect which would
prevent the consummation of the Merger or the other transactions contemplated by
this Agreement (each party agreeing to use its reasonable  efforts (as set forth
in  Section  5.04) to have any such  injunction  or  restraining  order or other
order,  decree or ruling lifted) and no action,  suit,  claim or proceeding by a
Governmental  Entity  before any  domestic  court,  governmental  commission  or
administrative or regulatory  authority shall have been commenced and be pending
which  seeks  to  restrain,  prevent  or  materially  delay or  restructure  the
transactions  contemplated  by this Agreement or which  otherwise  questions the
validity or legality of any such transaction,  other than actions, suits, claims
and  proceedings  which,  in the  reasonable  opinion of counsel to the relevant
party, are unlikely to result in an adverse judgment.

                                   ARTICLE VII
                        CONDITIONS TO OBLIGATIONS OF ISPH

     The  obligation  of ISPH to  effect  the  Merger  shall be  subject  to the
satisfaction  or  waiver,  on or  before  the  Closing  Date,  of the  following
conditions:

     SECTION 7.01  REPRESENTATIONS  AND WARRANTIES TRUE. The representations and
warranties of the Company  contained  herein shall be true and correct as of the
date  of  this  Agreement  and,   without  giving  effect  to  any   materiality
qualifications or limitations  therein,  on and as of the Closing Date as though
made on and as of the Closing  Date  (except to the extent such  representations
and  warranties  expressly  speak as of a specified  earlier date, in which case
such representations and warranties shall be true and correct as of such earlier
date),  except such failures to be true and correct that in the aggregate  would
not  reasonably be expected to have a Material  Adverse  Effect;  and ISPH shall
have  received  a  certificate  signed  on behalf  of the  Company  by the chief
executive officer of the Company to such effect.

     SECTION 7.02  PERFORMANCE OF OBLIGATIONS.  The Company shall have performed
in all material respects its agreements  contained in this Agreement required to
be performed by it on or prior to the Closing Date, and ISPH shall have received
a certificate  signed on behalf of the Company by the chief executive officer of
the Company to such effect.


                                      A-12


                                  ARTICLE VIII
                    CONDITIONS TO OBLIGATIONS OF THE COMPANY

     The  obligation  of the Company  under this  Agreement to effect the Merger
shall be subject to the  satisfaction or waiver,  on or before the Closing Date,
of the following conditions:

     SECTION 8.01  REPRESENTATIONS  AND WARRANTIES TRUE. The representations and
warranties of ISPH contained  herein shall be true and correct as of the date of
this Agreement and, without giving effect to any materiality  qualifications  or
limitations  therein,  on and as of the Closing Date as though made on and as of
the Closing  Date  (except to the extent  such  representations  and  warranties
expressly   speak  as  of  a  specified   earlier   date,  in  which  case  such
representations  and  warranties  shall be true and  correct as of such  earlier
date),  except such failures to be true and correct that in the aggregate  would
not reasonably be expected to have a Material  Adverse  Effect;  and the Company
shall  have  received  a  certificate  signed  on  behalf  of ISPH by the  chief
executive officer of ISPH to such effect.

     SECTION 8.02  PERFORMANCE OF OBLIGATIONS.  ISPH shall have performed in all
material  respects its  agreements  contained in this  Agreement  required to be
performed  by it on or prior to the Closing  Date,  and the  Company  shall have
received a certificate  signed on behalf of ISPH by the chief executive  officer
of ISPH to such effect.

                                   ARTICLE IX
                        TERMINATION, AMENDMENT AND WAIVER

     SECTION 9.01  TERMINATION.  This Agreement may be terminated and the Merger
may be abandoned at any time prior to the Effective  Time,  notwithstanding  any
requisite adoption of this Agreement by the stockholders of the Company:

     (a)  by  mutual  written  consent  of  the  Company   (provided  that  such
termination has been approved by the Special Committee) and ISPH;

     (b) by either the Company (provided that such termination has been approved
by the  Special  Committee)  or ISPH if any  Governmental  Entity  of  competent
jurisdiction shall have issued a final nonappealable injunction,  order, decree,
judgment  or  ruling,   permanently   enjoining  or  otherwise  prohibiting  the
consummation of the transactions contemplated by this Agreement;

     (c) by either the Company (provided that such termination has been approved
by the Special  Committee) or ISPH if the Merger shall not have been consummated
on or before May 31,  2003,  unless the  failure of the Closing to occur by such
date  shall  be due to the  failure  of the  party  seeking  to  terminate  this
Agreement to perform or observe the covenants  and  agreements of such party set
forth herein;

     (d) by either the Company (provided that such termination has been approved
by the Special  Committee) or ISPH if there shall have been a material breach of
any of the covenants or agreements or any of the  representations  or warranties
set  forth  in this  Agreement  on the  part of the  Company  (in the  case of a
termination  by ISPH) or ISPH (in the  case of a  termination  by the  Company),
which breach is not cured within 30 days  following  written notice to the party
committing  such breach,  or which  breach,  by its nature or timing,  cannot be
cured  prior to the date  referred  to in Section  9.01(c);  PROVIDED  that such
breach,  if occurring  or  continuing  on the Closing  Date,  would  constitute,
individually  or in the aggregate  with other such breaches  occurring  prior to
such  time and then  continuing,  the  failure  of the  conditions  set forth in
Sections 7.01, 7.02, 8.01 or 8.02, as applicable;

     (e) by either the Company (provided that such termination has been approved
by the Special  Committee) or ISPH, if the Company  Meeting shall have been held
and the  holders  of  Company  Common  Stock  shall  have  failed to adopt  this
Agreement by the vote  specified in Section  6.01(a) and 6.01(b) at such meeting
(including any adjournment or postponement thereof in accordance with applicable
law);  PROVIDED that ISPH shall not have the right to terminate  this  Agreement
under this Section 9.01(e) if Majority Stockholder has failed to comply with its
obligation  to vote in favor of the  Merger  pursuant  to the  Voting  Agreement
delivered by it in connection with the execution and delivery of this Agreement;
or

     (f) by ISPH if the  Special  Committee  or the  Board of  Directors  of the
Company (acting upon the  recommendation  of the Special  Committee)  shall have
made an Adverse Company Board Recommendation.

     SECTION 9.02 EFFECT OF  TERMINATION.  In the event of  termination  of this
Agreement  by either  ISPH or the  Company as  provided  in Section  9.01,  this
Agreement shall forthwith  become void and have no effect,  and none of Majority
Stockholder,  ISPH, the Company, any of their respective  Subsidiaries or any of
the  officers or  directors  of any of them,  as the case may be, shall have any
liability  of  any  nature  whatsoever  hereunder,  or in  connection  with  the
transactions  contemplated hereby, except that Sections 9.02, 9.04 and Article X
shall survive any termination of this Agreement, and notwithstanding anything


                                      A-13


to the contrary contained in this Agreement, none of Majority Stockholder,  ISPH
or the Company  shall be relieved or released  from any  liabilities  or damages
arising out of its willful breach of any provision of this  Agreement;  PROVIDED
that in no event shall any party hereto be liable for any punitive damages.

     SECTION 9.03  AMENDMENT.  Subject to compliance  with  applicable law, this
Agreement  may be amended by ISPH and the Company  (acting upon  approval by the
Special Committee) at any time before or after adoption of this Agreement by the
stockholders of the Company; PROVIDED,  HOWEVER, that after any adoption of this
Agreement by the  stockholders of the Company,  no amendment shall be made which
by law  requires  further  approval by such  stockholders  without  such further
approval (including the Majority-of-Minority  Condition). This Agreement may not
be amended  except by an instrument  in writing  signed on behalf of each of the
parties hereto.

     SECTION 9.04  EXTENSION;  WAIVER.  At any time prior to the Effective Time,
subject to compliance  with  applicable  law, ISPH and the Company  (acting upon
approval  by the Special  Committee)  may, to the extent  legally  allowed,  (a)
extend the time for the  performance of any of the  obligations or other acts of
the other  parties  hereto for its benefit,  (b) waive any  inaccuracies  in the
representations  and  warranties of the other parties for its benefit  contained
herein or in any  document  delivered  pursuant  hereto,  (c)  waive any  rights
contained  herein for the waiving party's benefit and (d) waive  compliance with
any of the  agreements or conditions  contained  herein for the waiving  party's
benefit.  Any  agreement on the part of a party hereto to any such  extension or
waiver shall be valid only if set forth in a written instrument signed on behalf
of such  party,  but such  extension  or waiver or  failure  to insist on strict
compliance  with an  obligation,  covenant,  agreement  or  condition  shall not
operate as a waiver of, or estoppel  with  respect to, any  subsequent  or other
failure.

                                    ARTICLE X
                               GENERAL PROVISIONS

     SECTION 10.01 NON-SURVIVAL OF  REPRESENTATIONS,  WARRANTIES AND AGREEMENTS.
The  representations,  warranties  and  agreements  in  this  Agreement  and any
certificate  delivered  pursuant  hereto by any person  shall  terminate  at the
Effective Time or upon the  termination  of this  Agreement  pursuant to Section
9.01, as the case may be, except that the agreements set forth in Articles I and
II and Section 5.08 shall survive the Effective Time indefinitely, and those set
forth in  Section  9.02 and 9.04 and this  Article X shall  survive  termination
indefinitely.

     SECTION 10.02 EXPENSES. Except as otherwise provided in this Section 10.02,
all costs and  expenses  incurred  in  connection  with this  Agreement  and the
transactions  contemplated  hereby  shall be paid by the  party  incurring  such
expense. The cost of preparing, printing and mailing the Proxy Statement and the
Transaction Statement shall be borne by the Company.

     SECTION 10.03 NOTICES.  All notices,  requests,  claims,  demands and other
communications  hereunder  shall be in writing  and shall be given (and shall be
deemed to have been duly given upon receipt) by delivery in person, by facsimile
or by registered or certified mail (postage prepaid,  return receipt  requested)
or by a  nationally  recognized  overnight  courier  service  to the  respective
parties at the  following  addresses  (or at such other  address  for a party as
shall be specified in a notice given in accordance with this Section 10.03):

     if to ISPH:

     c/o International Specialty Products Holdings Inc.
     1361 Alps Road
     Wayne, NJ 07470
     Telecopy:    (973) 628-3229
     Attention:   Samuel J. Heyman


                                      A-14


     with copies to:

     Simpson Thacher & Bartlett
     425 Lexington Avenue
     New York, NY 10017
     Telecopy:    (212) 455-2502
     Attention:   Maripat Alpuche, Esq.

     if to the Company:

     c/o International Specialty Products Inc.
     1361 Alps Road
     Wayne, NJ 07470
     Telecopy:    (973) 628-3229
     Attention:   Richard A. Weinberg, Esq.

                  Special Committee Members:

                  Robert Englander
                  Burt Manning
                  Alan Meckler

     with a copy to:

     Willkie Farr & Gallagher
     787 Seventh Avenue
     New York, NY 10019-6099
     Telecopy:    (212) 728-2000
     Attention:   William J. Grant, Jr.
                  Michael A. Schwartz

     SECTION 10.04  DEFINITIONS  AND USAGE.  (a) For purposes of this Agreement,
the term:

     (i) "beneficial  owner" with respect to any shares means a person who shall
be deemed to be the beneficial owner of such shares,  as determined  pursuant to
Rule 13d-3 under the Exchange Act,  except that,  for purposes of this Agreement
and the Voting  Agreement,  the term shall exclude (x) shares which are held by,
or for the account of, a Charitable Organization and (y) shares which are deemed
beneficially  owned  pursuant to Rule 13d-3 solely  because of the  operation of
Rule 13d-3(d)(1)(i)(A);

     (ii) "BUSINESS  DAY" means any day other than a Saturday,  Sunday or one on
which banks are authorized by law to close in New York, New York;

     (iii)  "CHARITABLE  ORGANIZATION"  means a person that is recognized as tax
exempt pursuant to Section 501(c)(3) of the Code;

     (iv) "CODE"  means the  Internal  Revenue  Code of 1986,  as  amended.  All
citations to provisions of the Code, or to the Treasury Regulations  promulgated
thereunder, shall include any amendments thereto and any substitute or successor
provisions thereto;

     (v) "INCLUDING" means including, without limitation;

     (vi) "MATERIAL ADVERSE EFFECT" means,

         (A)  with  respect  to  the  Company,   any  changes  or  effects  that
     individually or in the aggregate (1) are or could reasonably be expected to
     be  material  and  adverse  to  the  condition  (financial  or  otherwise),
     business,  assets,  liabilities or results of operations of the Company and
     its Subsidiaries,  taken as a whole, or (2) could reasonably be expected to
     prevent or  materially  impair the  ability of the  Company to perform  its
     obligations   under  this  Agreement  or  to  consummate  the  transactions
     contemplated hereby; and

         (B) with respect to ISPH,  any effect that would  prevent or materially
     impair or delay the ability of ISPH to perform its  obligations  under this
     Agreement or to consummate the transactions contemplated hereby;

         PROVIDED,  HOWEVER, that Material Adverse Effect shall not be deemed to
     include  the  impact of  changes in  general  economic  conditions,  or the
     occurrence of other events or developments affecting the specialty chemical
     manufacturing  business  generally  except to the extent that such changes,
     events  or  developments  have an  adverse  effect on the  Company  and its
     Subsidiaries  taken as a whole that is materially  greater than the adverse
     effect on comparable entities;


                                      A-15


     (vii) "PERSON" means an individual, corporation, limited liability company,
partnership,  limited  partnership,  syndicate,  person (including a "person" as
defined in Section 13(d)(3) of the Exchange Act),  trust,  association or entity
or government, political subdivision, agency or instrumentality of a government;

     (viii)  "SUBSIDIARY" and "SIGNIFICANT  SUBSIDIARY"  shall have the meanings
ascribed to them in Rule 1-02 of Regulation S-X of the SEC.  Notwithstanding the
foregoing,  for purposes of this  Agreement,  the Company  shall not be deemed a
Subsidiary or a Significant Subsidiary of Majority Stockholder.

     A reference in this  Agreement  to any statute  shall be to such statute as
amended  from  time  to  time,  and to the  rules  and  regulations  promulgated
thereunder.

     (b) A fact,  event,  circumstance or occurrence  shall be within a person's
"KNOWLEDGE"  if, with  respect to the Company or any of its  Subsidiaries,  such
fact,  event,  circumstance or occurrence is or was actually known by any of the
Company's or the relevant Subsidiary's executive officers or directors, or, with
respect to ISPH,  such  fact,  event or  circumstance  or  occurrence  is or was
actually known by any of ISPH's executive officers or directors.

     (c) The symbol "$" and the word  "dollar" or  "dollars"  shall refer to the
lawful currency of the United States of America.

     SECTION 10.05 ACCOUNTING  TERMS. All accounting terms used herein which are
not expressly defined in this Agreement shall have the respective meanings given
to them in accordance with GAAP.

     SECTION 10.06 DISCLOSURE SCHEDULES.  Prior to the execution and delivery of
this  Agreement,  the Company has  delivered  to ISPH  schedules  (the  "COMPANY
DISCLOSURE  SCHEDULES")  setting  forth,  among other things,  in each case with
respect to specified  sections of this Agreement,  items the disclosure of which
is  necessary  or  appropriate  either  in  response  to an  express  disclosure
requirement contained in a provision hereof or as an exception to one or more of
the Company's  representations or warranties  contained in Article III or to one
or more  of the  Company's  covenants  contained  in  Sections  5.01;  PROVIDED,
HOWEVER,  that notwithstanding  anything in this Agreement to the contrary,  the
mere inclusion of an item in the Company Disclosure Schedules as an exception to
a  representation  or warranty  shall not be deemed an admission by a party that
such  item  represents  a  material   exception  or  material  fact,   event  or
circumstance or that such item has had or would reasonably be expected to have a
Material  Adverse Effect with respect to the Company.  Matters  disclosed in any
particular section of the Company  Disclosure  Schedules shall be deemed to have
been  disclosed  in any other  section  with  respect  to which  such  matter is
relevant so long as the relevance of such disclosure is readily apparent.

     SECTION  10.07  SEVERABILITY.  If any  term  or  other  provision  of  this
Agreement is invalid, illegal or incapable of being enforced by any rule of law,
or public policy,  all other  conditions and provisions of this Agreement  shall
nevertheless  remain in full force and effect so long as the major  economic  or
legal substance of the Merger is not affected in any manner  materially  adverse
to any  party.  Upon  such  determination  that any term or other  provision  is
invalid,  illegal or  incapable  of being  enforced,  the parties  hereto  shall
negotiate  in good faith to modify this  Agreement  so as to effect the original
intent of the parties as closely as possible in a mutually  acceptable manner in
order that the Merger be consummated as originally  contemplated  to the fullest
extent possible.

     SECTION 10.08 ENTIRE AGREEMENT;  ASSIGNMENT.  This Agreement (including the
Company Disclosure  Schedules,  which are hereby  incorporated herein and made a
part  hereof for all  purposes  as if fully set forth  herein)  constitutes  the
entire agreement among the parties with respect to the subject matter hereof and
supersedes all prior agreements and  undertakings,  both written and oral, among
the parties,  or any of them,  with respect to the subject matter  hereof.  This
Agreement  shall not be assigned by operation  of law or  otherwise  without the
prior  written  consent of the other  parties,  which shall not be  unreasonably
withheld,  except that ISPH may assign all or any of its rights and  obligations
hereunder  to any  wholly-owned  Subsidiary  of ISPH or entity  wholly-owned  by
Majority Stockholder.

     SECTION 10.09 PARTIES IN INTEREST. This Agreement shall be binding upon and
inure solely to the benefit of each party hereto, and nothing in this Agreement,
express or implied,  is intended  to or shall  confer upon any other  person any
right,  benefit  or remedy of any nature  whatsoever  under or by reason of this
Agreement,  other than the  provisions of Article II and Section 5.08 (which are
intended  to be for  the  benefit  of the  persons  covered  thereby  and may be
enforced by such persons).

     SECTION  10.10  SPECIFIC   PERFORMANCE.   The  parties  hereto  agree  that
irreparable  damage would occur in the event any provision of this Agreement was
not performed in accordance  with the terms hereof and that the parties shall be
entitled to an injunction or injunctions  to prevent  breaches of this Agreement
and to specific performance of the terms hereof, in addition to any other remedy
at law or in equity.


                                      A-16

     SECTION  10.11  GOVERNING  LAW.  This  Agreement  shall be  governed by and
construed in  accordance  with the laws of the State of Delaware  applicable  to
contracts made and to be performed  entirely in such State.  Each of the parties
irrevocably  and  unconditionally  waives,  to the fullest  extent  permitted by
applicable  law,  any and all  rights  to trial by jury in  connection  with any
litigation  arising  out of or relating to this  Agreement  or the  transactions
contemplated hereby.

     SECTION  10.12  HEADINGS.   The  descriptive  headings  contained  in  this
Agreement are included for convenience of reference only and shall not affect in
any way the meaning or interpretation of this Agreement.

     SECTION 10.13  COUNTERPARTS.  This  Agreement may be executed and delivered
(including by facsimile  transmission) in one or more  counterparts,  and by the
different parties hereto in separate  counterparts,  each of which when executed
and delivered  shall be deemed to be an original but all of which taken together
shall constitute one and the same agreement.

     SECTION 10.14 CONSTRUCTION. This Agreement and any documents or instruments
delivered  pursuant hereto or in connection  herewith shall be construed without
regard to the identity of the person who drafted the various  provisions  of the
same.  Each and every  provision of this Agreement and such other  documents and
instruments shall be construed as though all of the parties participated equally
in the drafting of the same.  Consequently,  the parties  acknowledge  and agree
that any rule of  construction  that a document is to be  construed  against the
drafting  party shall not be applicable  either to this  Agreement or such other
documents and instruments.

     SECTION 10.15 NO PECUNIARY  INTEREST.  The parties hereto  acknowledge that
the Majority  Stockholder  has disclaimed any pecuniary  interest in the Company
Common  Stock in excess of his  interests  in certain  limited  partnership  and
limited liability company entities that own shares of Company Common Stock.

                                    * * * * *

                  (remainder of page intentionally left blank)


                                      A-17


     IN WITNESS  WHEREOF,  the Company and ISPH have caused this Agreement to be
executed  as of the  date  first  written  above by  their  respective  officers
thereunto duly authorized.

                              INTERNATIONAL SPECIALTY
                              PRODUCTS INC.


                              By:  /s/ RICHARD A. WEINBERG
                                  ----------------------------------
                                  Name:        Richard A. Weinberg
                                  Title:       Executive Vice
                                               President and General Counsel

                              INTERNATIONAL SPECIALTY
                              PRODUCTS HOLDINGS INC.




                              By:  /s/ SUNIL KUMAR
                                  ----------------------------------
                                  Name:        Sunil Kumar
                                  Title:       President and Chief
                                               Executive Officer


                                      A-18


                                                                         ANNEX B

                                 LEHMAN BROTHERS

                                                                November 8, 2002

Special Committee of the Board of Directors
International Specialty Products Inc.
1361 Alps Road
Wayne, NJ 07470

Members of the Special Committee of the Board:

     We understand that  International  Specialty  Products Inc. (the "Company")
intends  to  enter  into an  agreement  with  International  Specialty  Products
Holdings Inc.  ("ISPH")  pursuant to which ISPH will be merged with and into the
Company (the "Proposed  Transaction"  or the "Merger").  We also understand that
Samuel J. Heyman, the Chairman of the Board of Directors of the Company,  is the
beneficial  owner of  approximately  80.9% of the shares of the Company's common
stock,  par value  $0.01 per  share  (the  "Company  Common  Stock")  and is the
beneficial  owner of 100% of the  shares of  common  stock of ISPH.  We  further
understand that, upon effectiveness of the Merger,  each share of Company Common
Stock issued and  outstanding  immediately  prior to the  effective  time of the
Merger  (other than (i) shares of Company  Common  Stock  beneficially  owned by
Samuel J.  Heyman,  (ii)  shares of  Company  Common  Stock that are held in the
treasury of the Company or by any subsidiary of the Company, and (iii) shares of
Company  Common  Stock  that are held by  holders  who  have  properly  demanded
appraisal of such shares in  accordance  with the Delaware  General  Corporation
Law) will be converted into the right to receive $10.30 in cash. Based on advice
of the management of the Company, we further understand that Mr. Heyman does not
currently  intend to sell his  interest in the Company  (other than as permitted
pursuant to the terms of the Voting  Agreement  to be entered  into  between Mr.
Heyman and the  Company) or to solicit or  entertain  any  proposals  from third
parties for the acquisition of the Company as, or substantially as, an entirety.
The terms  and  conditions  of the  Proposed  Transaction  are set forth in more
detail in the  Agreement  and Plan of Merger,  dated as of November 8, 2002 (the
"Agreement"), between the Company and ISPH.

     We have been  requested by the Special  Committee of the Board of Directors
of the  Company to render our  opinion  with  respect  to the  fairness,  from a
financial  point of view, to the Company's  shareholders  (other than Mr. Heyman
and his  affiliates) of the  consideration  offered to such  shareholders in the
Proposed Transaction. We have not been requested to opine as to, and our opinion
does not in any manner address,  the Company's  underlying  business decision to
proceed with or effect the Proposed Transaction.

     In arriving at our opinion, we reviewed and analyzed: (1) the Agreement and
the  specific  terms  of  the  Proposed  Transaction;   (2)  publicly  available
information  concerning  the  Company  that we  believe  to be  relevant  to our
analysis, including the Company's Annual Report on Form 10-K for the fiscal year
ended  December 31, 2001, the Company's  Quarterly  Reports on Form 10-Q for the
quarters ended March 31 and June 30, 2002, and the amended Schedule 13D filed by
Mr. Heyman on July 9, 2002; (3) financial and operating information with respect
to the business,  operations and prospects of the Company furnished to us by the
Company,  including,  without  limitation,  (i)  certain  projections  of future
financial  performance of the Company  prepared by management of the Company and
provided  to us on  September  3,  2002  and  (ii)  certain  updated  and  lower
projections  of  future  financial   performance  of  the  Company  prepared  by
management  of the Company and  presented  to us and the  Special  Committee  on
October  21,  2002 (the  "Updated  Projections");  (4) a trading  history of the
Company  Common Stock from June 25, 1991 to the present and a comparison of that
trading  history with those of other  companies that we deemed  relevant;  (5) a
comparison of the historical  financial results and present financial  condition
of the Company with those of other companies that we deemed relevant;  and (6) a
comparison of the financial terms of the Proposed Transaction with the financial
terms of certain other recent transactions that we deemed relevant. In addition,
we have had  discussions  with the  management  of the  Company  concerning  the
businesses, operations, assets, financial condition and prospects of the Company
and have undertaken such other studies, analyses and investigations as we deemed
appropriate.

     In arriving at our  opinion,  we have  assumed and relied upon the accuracy
and  completeness  of the  financial  and other  information  used by us without
assuming any responsibility for independent verification of such information and
have further  relied upon the  assurances of management of the Company that they
are not aware of any facts or  circumstances  that would  make such  information
inaccurate  or  misleading.  With respect to the  financial  projections  of the
Company,  we have been advised by the Company that the Updated  Projections have
been reasonably prepared on a basis reflecting the best currently avail-

                                      B-1


able  estimates and judgments of the  management of the Company as to the future
financial  performance  of the Company and,  accordingly,  have assumed that the
Company  will  perform   substantially  in  accordance  with  such  projections.
Furthermore,  we have discussed the Updated  Projections  with the management of
the Company and the Special  Committee,  and it has been agreed that the Updated
Projections are the  appropriate  projections to use in performing our analysis.
In arriving at our opinion,  we have not conducted a physical  inspection of the
properties  and  facilities  of the Company  and have not made or  obtained  any
evaluations  or  appraisals  of the assets or  liabilities  of the  Company.  In
addition, you have not authorized us to solicit, and we have not solicited,  any
indications of interest from any third party with respect to the purchase of all
or a part of the  Company's  business.  Our  opinion  necessarily  is based upon
market,  economic and other conditions as they exist on, and can be evaluated as
of, the date of this letter.

     Based upon and  subject to the  foregoing,  we are of the opinion as of the
date hereof that, from a financial point of view, the  consideration  offered to
the  Company's  shareholders  in  the  Proposed  Transaction  is  fair  to  such
shareholders (other than Mr. Heyman and his affiliates).

     We have acted as financial advisor to the Special Committee of the Board of
Directors of the Company in connection  with the Proposed  Transaction  and will
receive a fee for our services. In addition, the Company has agreed to indemnify
us for certain  liabilities that may arise out of the rendering of this opinion.
In the ordinary  course of our business,  we may actively  trade in the debt and
equity securities of the Company for our own account and for the accounts of our
customers  and,  accordingly,  may at any time hold a long or short  position in
such securities.

     This  opinion is for the use and  benefit of the Special  Committee  of the
Board of  Directors  of the Company and is rendered to the Special  Committee of
the Board of  Directors in  connection  with its  consideration  of the Proposed
Transaction.  This  opinion  is not  intended  to be and does not  constitute  a
recommendation  to any  shareholder  of the  Company as to how such  shareholder
should vote with respect to the Proposed Transaction.



                                                   Very truly yours,



                                                   LEHMAN BROTHERS


                                      B-2


                                                                         ANNEX C

                          STOCKHOLDER VOTING AGREEMENT

     THIS STOCKHOLDER VOTING AGREEMENT (this "AGREEMENT"),  dated as of November
8,  2002,  by and  among  INTERNATIONAL  SPECIALTY  PRODUCTS  INC.,  a  Delaware
corporation (the "COMPANY") and SAMUEL J. HEYMAN (the "STOCKHOLDER").

                               W I T N E S S E T H:

     WHEREAS,  concurrently herewith,  International Specialty Products Holdings
Inc., a Delaware  corporation  (the "MERGER SUB"),  and the Company are entering
into an Agreement and Plan of Merger (as such agreement may hereafter be amended
from time to time, the "MERGER AGREEMENT");

     WHEREAS, as of the date hereof, the Stockholder is the beneficial owner (as
such term is  defined  in the  Merger  Agreement)  of (x)  52,328,040  shares of
Company Common Stock, representing approximately 80.9% of all outstanding shares
of Company Common Stock, and (y) all of the capital stock of Merger Sub;

     WHEREAS,  approval of the Merger Agreement by the Company's stockholders is
required in order to consummate the Merger;

     WHEREAS,   the  board  of   directors   of  the  Company   (acting  on  the
recommendation  of a special  committee)  has,  prior to the  execution  of this
Agreement,  duly and validly  approved and adopted the Merger  Agreement and has
resolved to recommend that its stockholders  approve the Merger  Agreement,  and
such approval, adoption and resolution have not been withdrawn; and

     NOW, THEREFORE,  in consideration of the foregoing and the mutual promises,
representations,  warranties, respective covenants and agreements of the parties
contained herein and for other good and valuable consideration,  the receipt and
sufficiency of which are hereby  acknowledged by each of the parties hereto, the
parties hereto, intending to be legally bound hereby, agree as follows:

                                    ARTICLE I
                               CERTAIN DEFINITIONS

     Section 1.1 DEFINED  TERMS.  Terms used in this Agreement and not otherwise
defined herein shall have the respective  meanings ascribed to such terms in the
Merger Agreement.

                                   ARTICLE II
                                VOTING AGREEMENT

     Section 2.1 AGREEMENT TO VOTE. Upon the terms and subject to the conditions
hereof, the Stockholder  irrevocably and unconditionally agrees that, until this
Agreement is terminated  pursuant to Section 5.1 hereof, at any meeting (whether
annual or special,  and whether or not an adjourned or postponed meeting) of the
Company's  stockholders,  however  called,  or in  connection  with any  written
consent of the Company's  stockholders,  the Stockholder shall vote, or cause to
be voted  (including by written  consent,  if applicable)  all shares of Company
Common Stock then beneficially owned by the Majority Stockholder (i) in favor of
the  adoption  of the Merger  Agreement  and (ii)  against  any action  that may
reasonably be expected to result in the conditions set forth in Articles VI, VII
and VIII of the Merger Agreement not being fulfilled. The Stockholder agrees not
to enter into any agreement or commitment  with any person,  the effect of which
would  be  inconsistent  with or  violative  of the  provisions  and  agreements
contained in this Article II.

                                   ARTICLE III
                         REPRESENTATIONS AND WARRANTIES

     Section 3.1 REPRESENTATIONS AND WARRANTIES OF STOCKHOLDER.  The Stockholder
represents and warrants to the Company that the following  statements are, as of
the date of this Agreement, true and correct:

     (a) The  Stockholder  is the beneficial  owner of the Majority  Stockholder
Shares.  The  Stockholder has the sole power to vote (or cause to be voted) such
Majority Stockholder Shares.


                                      C-1


     (b) This Agreement has been duly executed and delivered by the Stockholder.

     (c) This  Agreement  constitutes  the valid and  binding  agreement  of the
Stockholder, enforceable against the Stockholder in accordance with its terms.

     (d) The execution and delivery of this  Agreement by the  Stockholder  does
not violate or breach,  except as will not materially  impair the ability of the
Stockholder  to  effectuate,  carry out or comply  with all of the terms of this
Agreement,  (i) any applicable law,  governmental  approval or contract to which
the Stockholder is a party or by which the Stockholder's  assets may be bound or
(ii)  require any  consent or  approval  of, or filing  with,  any  Governmental
Entity.

     Section  3.2  REPRESENTATIONS  AND  WARRANTIES  OF  COMPANY.   The  Company
represents and warrants to the Stockholder that the following statements are, as
of the date of this Agreement, true and correct:

     (a)  This  Agreement  has  been  duly  executed  and  delivered  by a  duly
authorized officer of the Company.

     (b) This  Agreement  constitutes  the valid and  binding  agreement  of the
Company, enforceable against the Company in accordance with its terms.

     (c) The  execution  and delivery of this  Agreement by the Company does not
violate or breach, and will not give rise to any violation or breach, of (i) the
Company's  certificate of  incorporation  and by-laws or (ii) except as will not
materially impair its ability to effectuate, carry out or comply with all of the
terms of this  Agreement,  (A) any  applicable  law,  governmental  approval  or
contract to which the Company or its  Subsidiaries are a party or by which their
respective  assets or  properties  may be bound or (B)  require  any  consent or
approval of, or filing with, any Governmental Entity.

                                   ARTICLE IV
                                    COVENANTS

     Section 4.1  COVENANTS OF THE  STOCKHOLDER.The  Stockholder  covenants  and
agrees with the Company  that,  during the period  commencing on the date hereof
and ending on the date this Agreement is terminated under Article V hereof:

     (a) The  Stockholder  shall not,  directly or indirectly,  sell,  transfer,
pledge,  hypothecate,  encumber,  assign or dispose of any Majority  Stockholder
Shares  (or the  beneficial  ownership  thereof)  or offer to make  such a sale,
transfer or other disposition  (collectively,  "TRANSFER") to any person, except
(i) a Transfer to a Charitable  Organization  or (ii) Transfers of up to 114,336
Majority  Stockholder  Shares  currently held by Heyman Joint Venture II LLC, so
long as, in each case,  after giving effect to such  Transfer,  the  Stockholder
remains a beneficial owner of at least seventy-five  percent (75%) of the issued
and outstanding Company Common Stock.

     (b) The  Stockholder  shall  execute and deliver such other  documents  and
instruments  and take such further  actions as are  necessary in order to ensure
that the Company receives the benefit of this Agreement.

                                    ARTICLE V
                                   TERMINATION

     Section  5.1  TERMINATION.  This  Agreement  shall  terminate  and be of no
further  force or effect upon the earlier to occur of (i) the mutual  consent of
the Company (with the approval of the Special  Committee)  and the  Stockholder,
(ii) the Effective  Time,  (iii) the termination of the Merger  Agreement,  (iv)
written  notice of termination by either party hereto if there has been a breach
by the other party of any  representation,  warranty or  agreement  contained in
this Agreement or (v) the making of an Adverse Company Board Recommendation.

     Section 5.2 EFFECT OF TERMINATION.  In the event of any termination of this
Agreement,  this  Agreement  (other than Sections 6.1 through  6.13,  inclusive)
shall  become void and of no effect with no  liability  on the part of any party
hereto;  PROVIDED that no such  termination  shall relieve any party hereto from
liability for any breach of this Agreement prior to termination thereof.

                                   ARTICLE VI
                                     GENERAL

     Section 6.1  NOTICES.  All  notices,  requests,  claims,  demands and other
communications  hereunder  shall be in writing  and shall be deemed to have been
duly given (a) on the date of delivery if delivered personally, (b) on the first
Business  Day  following  the date of  dispatch  if  delivered  by a  nationally
recognized next-day courier service, (c) on the fifth Business Day following the
date of mailing if delivered by registered  or certified  mail,  return  receipt
requested, postage prepaid or (d) if


                                      C-2


sent by facsimile transmission, with a copy mailed on the same day in the manner
provided  in (a) or (b) above,  when  transmitted  and receipt is  confirmed  by
telephone;  provided  that any notice  received by facsimile or otherwise at the
addressee's  location on any  Business  Day after 5:00 p.m.  (addressee's  local
time)  shall be deemed to have been  received  at 9:00 a.m.  (addressee's  local
time) on the next Business Day. Any party to this Agreement may notify any other
party of any changes to the  address or any of the other  details  specified  in
this paragraph,  provided that such notification  shall only be effective on the
date  specified  in such  notice or five (5)  Business  Days after the notice is
given, whichever is later. Rejection or other refusal to accept or the inability
to  deliver  because of  changed  address of which no notice was given  shall be
deemed to be receipt of the notice as of the date of such rejection,  refusal or
inability to deliver. All notices hereunder shall be delivered to the parties as
set forth below, or pursuant to such other  instructions as may be designated in
writing by the party to receive such notice:

     if to the Company, to it at:

     c/o International Specialty Products Inc.
     1361 Alps Road
     Wayne, NJ 07470
     Attention:   Richard A. Weinberg, Esq.
                  Robert Englander
                  Burt Manning
                  Alan Meckler
     Telephone: 973-628-4000
     Fax: 973-628-3229

     with a copy to:

     Willkie Farr & Gallagher
     787 Seventh Avenue
     New York, NY 10019-6099
     Attention:   William J. Grant, Jr.
                  Michael A. Schwartz
     Telephone: 212-728-8000
     Fax: 212-728-8111

     if to the Stockholder, to it at:

     Samuel J. Heyman
     1361 Alps Road
     Wayne, NJ 07470
     Telephone: 973-628-4000
     Fax: 973-628-3229

     with a copy to:

     Simpson Thacher & Bartlett
     425 Lexington Avenue
     New York, NY 10017
     Attention:   Maripat Alpuche
     Telephone: 212-455-2000
     Fax: 212-455-2502

     Section 6.2 NO THIRD-PARTY BENEFICIARIES. This Agreement is not intended to
confer third party beneficiary rights upon any person.

     Section  6.3  GOVERNING  LAW.  This  Agreement  shall  be  governed  by and
construed in  accordance  with the laws of the State of Delaware  applicable  to
contracts made and to be performed  entirely in such State.  Each of the parties
irrevocably  and  unconditionally  waives,  to the fullest  extent  permitted by
applicable  law,  any and all  rights  to trial by jury in  connection  with any
litigation  arising  out of or relating to this  Agreement  or the  transactions
contemplated hereby.


                                      C-3


      Section  6.4  SEVERABILITY.  In the  event  that  any  one or  more of the
provisions contained herein, or the application thereof in any circumstances, is
held to be invalid, illegal or unenforceable in any respect for any reason under
any present or future law,  public policy or order,  (i) such provision shall be
fully  severable and (ii) this  Agreement  shall be construed and enforced as if
such illegal,  invalid or  unenforceable  provision  had never  comprised a part
hereof.  Upon such  determination  that any term or other  provision is invalid,
illegal or  incapable of being  enforced,  the parties  shall  negotiate in good
faith  with a view to the  substitution  therefor  of a suitable  and  equitable
solution in order to carry out to the maximum extent possible,  so far as may be
valid, legal and enforceable,  the intent and purpose of such invalid provision;
PROVIDED that the validity, legality and enforceability of any such provision in
every other respect and of the remaining  provisions  contained herein shall not
be in any way impaired  thereby,  it being  intended  that all of the rights and
privileges  of the parties  hereto shall be  enforceable  to the fullest  extent
permitted by law.

     Section  6.5  ASSIGNMENT.  Neither  this  Agreement  nor the  rights or the
obligations  of either party hereto are  assignable in whole or in part (whether
by  operation  of law or  otherwise),  without the written  consent of the other
parties  and the  Company  and any  attempt  to do so in  contravention  of this
Section 6.5 shall be void.

     Section 6.6 SUCCESSORS. This Agreement shall inure to the benefit of and be
binding upon the parties  hereto and their  respective  successors and permitted
assigns.

     Section 6.7  INTERPRETATION.  When a reference is made in this Agreement to
Sections,  such  reference  shall  be to a  Section  of  this  Agreement  unless
otherwise indicated. Whenever the words "include," "includes" or "including" are
used in this  Agreement,  they  shall be  deemed  to be  followed  by the  words
"without  limitation." The words "hereof,"  "herein" and "herewith" and words of
similar import shall,  unless  otherwise  stated,  be construed to refer to this
Agreement as a whole and not to any particular provision of this Agreement.  The
definitions  contained in this  Agreement are applicable to the singular as well
as the  plural  forms  of  such  terms  and to the  masculine  as well as to the
feminine and neuter genders of such term. Any agreement or instrument defined or
referred to herein or in any agreement or instrument  that is referred to herein
means such  agreement or instrument  as from time to time  amended,  modified or
supplemented  and  attachments  thereto and  instruments  incorporated  therein.
References to a person are also to its  successors  and permitted  assigns.  The
parties  have  participated  jointly in the  negotiation  and  drafting  of this
Agreement.  In the event an  ambiguity  or question of intent or  interpretation
arises,  this Agreement  shall be construed as if drafted jointly by the parties
and no presumption  or burden of proof shall arise  favoring or disfavoring  any
party by virtue of the  authorship of any of the  provisions of this  Agreement.
Any reference to any federal,  state,  local or foreign  statute or law shall be
deemed to also to refer to any amendments  thereto and all rules and regulations
promulgated thereunder, unless the context requires otherwise.

     Section 6.8  AMENDMENTS.  This  Agreement  may not be amended,  modified or
waived except by written  agreement  signed by the  Stockholder  and the Company
(upon the approval of the Special Committee).

     Section  6.9  ENTIRE  AGREEMENT.  This  Agreement  constitutes  the  entire
agreement  between the parties  with  respect to the subject  matter  hereof and
supersedes all prior agreements, understandings,  negotiations,  representations
and  warranties,  and  discussions,  whether oral or written,  among the parties
hereto, with respect to the subject matter hereof.

      Section 6.10 COUNTERPARTS. This Agreement may be executed in counterparts,
each of which  shall be  deemed an  original,  but all of which  together  shall
constitute one and the same  instrument  and shall become  effective when one or
more  counterparts  have been signed by each of the parties and delivered to the
other parties.

     Section  6.11  EXECUTION.  This  Agreement  may be  executed  by  facsimile
signatures  by any party and such  signature  shall be  deemed  binding  for all
purposes  hereof,  without  delivery of an original  signature being  thereafter
required.

     Section 6.12 SPECIFIC  PERFORMANCE.  The parties  hereto  acknowledge  that
irreparable  damage  would  result  if  this  Agreement  were  not  specifically
enforced,  and agree that the rights and  obligations  of the parties under this
Agreement may be enforced by a decree of specific  performance issued by a court
of competent  jurisdiction to the extent that specific  performance is available
under applicable law. Such remedy shall,  however, not be exclusive and shall be
in addition to any other  remedies which any party may have under this Agreement
or otherwise.

     Section  6.13  ACTION  IN  BENEFICIAL   STOCKHOLDER   CAPACITY   ONLY.  The
Stockholder does not make any agreement or understanding  herein in any capacity
other than as a beneficial owner of stock of the Company. The Stockholder hereby
disclaims  any pecuniary  interest in the Company  Common Stock in excess of his
interests in certain limited  partnership and limited liability company entities
that own shares of Company Common Stock.


                                      C-4


     IN WITNESS WHEREOF,  the parties have duly executed this Stockholder Voting
Agreement as of the date first above written.

                                        INTERNATIONAL SPECIALTY
                                        PRODUCTS INC.


                                        By: /s/ RICHARD A. WEINBERG
                                            --------------------------------
                                            Name:  Richard A. Weinberg
                                            Title: Executive Vice
                                                   President and General Counsel




                                        SAMUEL J. HEYMAN



                                            /s/  SAMUEL J. HEYMAN
                                            --------------------------------





                                      C-5




                                                                         ANNEX D

                GENERAL CORPORATION LAW OF THE STATE OF DELAWARE

SECTION 262. APPRAISAL RIGHTS.

     (a) Any  stockholder  of a  corporation  of this State who holds  shares of
stock on the date of the making of a demand  pursuant to subsection  (d) of this
section with respect to such shares,  who continuously holds such shares through
the effective date of the merger or  consolidation,  who has otherwise  complied
with  subsection  (d) of this section and who has neither  voted in favor of the
merger or consolidation  nor consented thereto in writing pursuant to ss. 228 of
this title  shall be entitled  to an  appraisal  by the Court of Chancery of the
fair  value  of the  stockholder's  shares  of  stock  under  the  circumstances
described in subsections  (b) and (c) of this section.  As used in this section,
the word "stockholder"  means a holder of record of stock in a stock corporation
and also a member of record of a nonstock  corporation;  the words  "stock"  and
"share"  mean and  include  what is  ordinarily  meant by those  words  and also
membership or membership interest of a member of a nonstock corporation; and the
words  "depository  receipt"  mean a  receipt  or other  instrument  issued by a
depository representing an interest in one or more shares, or fractions thereof,
solely of stock of a corporation, which stock is deposited with the depository.

     (b)  Appraisal  rights  shall be  available  for the shares of any class or
series of stock of a constituent  corporation in a merger or consolidation to be
effected  pursuant  to ss. 251 (other  than a merger  effected  pursuant  to ss.
251(g) of this title), ss. 252, ss. 254, ss. 257, ss. 258, ss. 263 or ss. 264 of
this title:

         (1)  Provided,  however,  that no  appraisal  rights under this section
     shall be  available  for the shares of any class or series of stock,  which
     stock, or depository  receipts in respect thereof, at the record date fixed
     to determine the stockholders  entitled to receive notice of and to vote at
     the  meeting  of  stockholders  to act  upon the  agreement  of  merger  or
     consolidation,  were either (i) listed on a national securities exchange or
     designated as a national market system security on an interdealer quotation
     system by the National Association of Securities Dealers, Inc. or (ii) held
     of  record  by more  than  2,000  holders;  and  further  provided  that no
     appraisal  rights  shall  be  available  for any  shares  of  stock  of the
     constituent  corporation  surviving  a merger if the merger did not require
     for its approval the vote of the stockholders of the surviving  corporation
     as provided in subsection (f) of ss. 251 of this title.

         (2) Notwithstanding paragraph (1) of this subsection,  appraisal rights
     under this section shall be available for the shares of any class or series
     of stock of a constituent  corporation if the holders  thereof are required
     by the terms of an agreement of merger or consolidation  pursuant to ss.ss.
     251, 252, 254, 257, 258, 263 and 264 of this title to accept for such stock
     anything except:

          a. Shares of stock of the corporation surviving or resulting from such
     merger or consolidation, or depository receipts in respect thereof;

          b. Shares of stock of any other corporation, or depository receipts in
     respect thereof,  which shares of stock (or depository  receipts in respect
     thereof)  or  depository  receipts at the  effective  date of the merger or
     consolidation  will be either listed on a national  securities  exchange or
     designated as a national market system security on an interdealer quotation
     system by the National  Association of Securities Dealers,  Inc. or held of
     record by more than 2,000 holders;

          c. Cash in lieu of fractional shares or fractional depository receipts
     described in the foregoing subparagraphs a. and b. of this paragraph; or

          d. Any  combination  of the shares of stock,  depository  receipts and
     cash  in  lieu of  fractional  shares  or  fractional  depository  receipts
     described in the foregoing subparagraphs a., b. and c. of this paragraph.

          (3) In the event all of the stock of a subsidiary Delaware corporation
     party to a merger  effected under ss. 253 of this title is not owned by the
     parent corporation immediately prior to the merger,  appraisal rights shall
     be available for the shares of the subsidiary Delaware corporation.

     (c) Any corporation may provide in its  certificate of  incorporation  that
appraisal  rights  under this section  shall be available  for the shares of any
class or series of its stock as a result of an amendment to its  certificate  of
incorporation,  any  merger  or  consolidation  in which  the  corporation  is a
constituent corporation or the sale of all or substantially all of the assets of
the corporation.  If the certificate of incorporation contains such a provision,
the procedures of this section, including those set forth in subsections (d) and
(e) of this section, shall apply as nearly as is practicable.


                                      D-1


     (d) Appraisal rights shall be perfected as follows:

         (1) If a proposed merger or  consolidation  for which appraisal  rights
     are  provided  under this  section is to be  submitted  for  approval  at a
     meeting of stockholders,  the  corporation,  not less than 20 days prior to
     the  meeting,  shall  notify each of its  stockholders  who was such on the
     record date for such  meeting  with  respect to shares for which  appraisal
     rights  are  available  pursuant  to  subsection  (b)  or (c)  hereof  that
     appraisal  rights  are  available  for  any or all  of  the  shares  of the
     constituent  corporations,  and shall include in such notice a copy of this
     section.  Each  stockholder  electing  to  demand  the  appraisal  of  such
     stockholder's shares shall deliver to the corporation, before the taking of
     the vote on the merger or consolidation,  a written demand for appraisal of
     such stockholder's  shares. Such demand will be sufficient if it reasonably
     informs the  corporation  of the identity of the  stockholder  and that the
     stockholder  intends thereby to demand the appraisal of such  stockholder's
     shares.  A proxy or vote  against  the  merger or  consolidation  shall not
     constitute such a demand.  A stockholder  electing to take such action must
     do so by a separate written demand as herein provided. Within 10 days after
     the  effective  date of such  merger or  consolidation,  the  surviving  or
     resulting  corporation  shall notify each  stockholder of each  constituent
     corporation  who has  complied  with this  subsection  and has not voted in
     favor of or consented to the merger or  consolidation  of the date that the
     merger or consolidation has become effective; or

         (2) If the merger or consolidation  was approved  pursuant to ss.228 or
     ss.253 of this title,  then,  either a constituent  corporation  before the
     effective  date  of  the  merger  or  consolidation,  or the  surviving  or
     resulting corporation within ten days thereafter,  shall notify each of the
     holders of any class or series of stock of such constituent corporation who
     are  entitled  to  appraisal  rights  of  the  approval  of the  merger  or
     consolidation and that appraisal rights are available for any or all shares
     of such class or series of stock of such constituent corporation, and shall
     include in such notice a copy of this  section.  Such  notice may,  and, if
     given on or after the effective date of the merger or consolidation, shall,
     also  notify  such  stockholders  of the  effective  date of the  merger or
     consolidation.  Any stockholder entitled to appraisal rights may, within 20
     days after the date of mailing of such  notice,  demand in writing from the
     surviving or resulting  corporation the appraisal of such holder's  shares.
     Such demand will be sufficient if it reasonably  informs the corporation of
     the identity of the stockholder and that the stockholder intends thereby to
     demand the appraisal of such holder's shares. If such notice did not notify
     stockholders of the effective date of the merger or  consolidation,  either
     (i) each such constituent corporation shall send a second notice before the
     effective date of the merger or consolidation notifying each of the holders
     of any class or series of stock of such  constituent  corporation  that are
     entitled  to  appraisal  rights  of the  effective  date of the  merger  or
     consolidation  or (ii) the  surviving or resulting  corporation  shall send
     such a second  notice to all such  holders  on or within 10 days after such
     effective date; provided,  however, that if such second notice is sent more
     than 20 days following the sending of the first notice,  such second notice
     need only be sent to each  stockholder who is entitled to appraisal  rights
     and who has demanded  appraisal of such holder's  shares in accordance with
     this subsection. An affidavit of the secretary or assistant secretary or of
     the  transfer  agent of the  corporation  that is  required  to give either
     notice that such notice has been given shall,  in the absence of fraud,  be
     prima  facie  evidence  of  the  facts  stated  therein.  For  purposes  of
     determining  the  stockholders  entitled  to receive  either  notice,  each
     constituent  corporation  may fix, in advance,  a record date that shall be
     not more than 10 days prior to the date the notice is given, provided, that
     if the  notice is given on or after  the  effective  date of the  merger or
     consolidation,  the record date shall be such effective  date. If no record
     date is fixed and the  notice is given  prior to the  effective  date,  the
     record date shall be the close of business  on the day next  preceding  the
     day on which the notice is given.

     (e)  Within  120  days   after  the   effective   date  of  the  merger  or
consolidation, the surviving or resulting corporation or any stockholder who has
complied with  subsections  (a) and (d) hereof and who is otherwise  entitled to
appraisal  rights,  may file a petition  in the Court of  Chancery  demanding  a
determination   of  the   value  of  the   stock   of  all  such   stockholders.
Notwithstanding  the  foregoing,  at any time within 60 days after the effective
date of the merger or  consolidation,  any  stockholder  shall have the right to
withdraw such stockholder's demand for appraisal and to accept the terms offered
upon the merger or  consolidation.  Within 120 days after the effective  date of
the  merger  or  consolidation,  any  stockholder  who  has  complied  with  the
requirements of subsections (a) and (d) hereof,  upon written request,  shall be
entitled to receive from the corporation  surviving the merger or resulting from
the  consolidation a statement  setting forth the aggregate number of shares not
voted in favor of the merger or consolidation  and with respect to which demands
for appraisal  have been  received and the  aggregate  number of holders of such
shares. Such written statement shall be mailed to the stockholder within 10 days
after such stockholder's written request for such a statement is received by the
surviving or resulting  corporation  or within 10 days after  expiration  of the
period for  delivery  of demands  for  appraisal  under  subsection  (d) hereof,
whichever is later.



                                      D-2


     (f) Upon the filing of any such  petition  by a  stockholder,  service of a
copy thereof  shall be made upon the surviving or resulting  corporation,  which
shall  within 20 days after such  service  file in the office of the Register in
Chancery in which the petition was filed a duly  verified  list  containing  the
names and  addresses of all  stockholders  who have  demanded  payment for their
shares and with whom  agreements  as to the value of their  shares have not been
reached by the  surviving or  resulting  corporation.  If the petition  shall be
filed  by  the  surviving  or  resulting  corporation,  the  petition  shall  be
accompanied  by such a duly  verified  list.  The  Register in  Chancery,  if so
ordered by the  Court,  shall  give  notice of the time and place  fixed for the
hearing of such  petition by  registered  or certified  mail to the surviving or
resulting corporation and to the stockholders shown on the list at the addresses
therein  stated.  Such notice shall also be given by 1 or more  publications  at
least  1  week  before  the  day of  the  hearing,  in a  newspaper  of  general
circulation published in the City of Wilmington, Delaware or such publication as
the Court deems  advisable.  The forms of the notices by mail and by publication
shall be  approved  by the Court,  and the costs  thereof  shall be borne by the
surviving or resulting corporation.

     (g) At the  hearing  on  such  petition,  the  Court  shall  determine  the
stockholders who have complied with this section and who have become entitled to
appraisal  rights.  The Court may require the  stockholders who have demanded an
appraisal for their shares and who hold stock  represented  by  certificates  to
submit  their  certificates  of stock to the  Register in Chancery  for notation
thereon of the pendency of the  appraisal  proceedings;  and if any  stockholder
fails to comply with such direction, the Court may dismiss the proceedings as to
such stockholder.

     (h) After determining the stockholders entitled to an appraisal,  the Court
shall appraise the shares, determining their fair value exclusive of any element
of value  arising  from the  accomplishment  or  expectation  of the  merger  or
consolidation,  together  with a fair rate of interest,  if any, to be paid upon
the amount  determined to be the fair value. In determining such fair value, the
Court shall take into account all relevant factors. In determining the fair rate
of interest, the Court may consider all relevant factors,  including the rate of
interest which the surviving or resulting  corporation  would have had to pay to
borrow money  during the pendency of the  proceeding.  Upon  application  by the
surviving or resulting corporation or by any stockholder entitled to participate
in the appraisal proceeding, the Court may, in its discretion,  permit discovery
or other pretrial  proceedings and may proceed to trial upon the appraisal prior
to the final  determination  of the  stockholder  entitled to an appraisal.  Any
stockholder  whose name appears on the list filed by the  surviving or resulting
corporation  pursuant to  subsection  (f) of this section and who has  submitted
such stockholder's certificates of stock to the Register in Chancery, if such is
required,  may  participate  fully  in  all  proceedings  until  it  is  finally
determined that such  stockholder is not entitled to appraisal rights under this
section.

     (i) The Court  shall  direct the  payment of the fair value of the  shares,
together with interest, if any, by the surviving or resulting corporation to the
stockholders entitled thereto.  Interest may be simple or compound, as the Court
may direct.  Payment shall be so made to each such  stockholder,  in the case of
holders of  uncertificated  stock  forthwith,  and the case of holders of shares
represented  by  certificates  upon  the  surrender  to the  corporation  of the
certificates  representing  such stock.  The  Court's  decree may be enforced as
other decrees in the Court of Chancery may be enforced,  whether such  surviving
or resulting corporation be a corporation of this State or of any state.

     (j) The costs of the  proceeding  may be  determined by the Court and taxed
upon the  parties  as the  Court  deems  equitable  in the  circumstances.  Upon
application  of a  stockholder,  the Court  may  order  all or a portion  of the
expenses   incurred  by  any   stockholder  in  connection  with  the  appraisal
proceeding,  including,  without limitation,  reasonable attorney's fees and the
fees and  expenses of experts,  to be charged pro rata  against the value of all
the shares entitled to an appraisal.

     (k) From and after the effective  date of the merger or  consolidation,  no
stockholder who has demanded  appraisal  rights as provided in subsection (d) of
this section  shall be entitled to vote such stock for any purpose or to receive
payment of dividends or other  distributions  on the stock (except  dividends or
other  distributions  payable to stockholders of record at a date which is prior
to the effective date of the merger or consolidation);  provided,  however, that
if no  petition  for an  appraisal  shall be filed  within the time  provided in
subsection  (e) of this  section,  or if such  stockholder  shall deliver to the
surviving or resulting  corporation a written  withdrawal of such  stockholder's
demand for an appraisal and an acceptance of the merger or consolidation, either
within 60 days  after the  effective  date of the  merger  or  consolidation  as
provided  in  subsection  (e) of this  section or  thereafter  with the  written
approval of the corporation,  then the right of such stockholder to an appraisal
shall cease. Notwithstanding the foregoing, no appraisal proceeding in the Court
of Chancery shall be dismissed as to any stockholder without the approval of the
Court,  and such approval may be conditioned  upon such terms as the Court deems
just.

     (l) The  shares of the  surviving  or  resulting  corporation  to which the
shares  of such  objecting  stockholders  would  have  been  converted  had they
assented to the merger or consolidation  shall have the status of authorized and
unissued shares of the surviving or resulting corporation.



                                      D-3





             PROXY SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS OF

                      INTERNATIONAL SPECIALTY PRODUCTS INC.

                         SPECIAL MEETING - ______, 200_


The undersigned stockholder hereby appoints _______________, ______________ and
_______________, and each of them, each with full power of substitution, the
proxies and attorneys-in-fact of the undersigned to attend the Special Meeting
of Stockholders of INTERNATIONAL SPECIALTY PRODUCTS INC. (ISP) to be held on
_________, 200_ at __ _.m., Eastern Standard Time, in ____________, and any
adjournments or postponements thereof, and to vote at said meeting and any
adjournments or postponements thereof all shares of stock of ISP standing in the
name of the undersigned stockholder.


This proxy is solicited on behalf of the board of directors. This proxy, when
properly executed, will be voted in the manner directed herein by the
undersigned stockholder. If no direction is made, the proxy will be voted FOR
proposal 1 and in the judgment of the persons named herein on any other matter
that may properly come before the meeting or any adjournments or postponements
of the special meeting.

            (Continued and To Be Dated and Signed On The Other Side)
 -------------------------------------------------------------------------------

                       SPECIAL MEETING OF STOCKHOLDERS OF

                      INTERNATIONAL SPECIALTY PRODUCTS INC.


                                  ______, 200_


                          -----------------------------
                            PROXY VOTING INSTRUCTIONS
                          -----------------------------




                                                                               2

TO VOTE YOUR SHARES

Please date, sign and mail your proxy card in the envelope provided as soon as
possible.

          * PLEASE DETACH AND MAIL IN THE ENVELOPE PROVIDED *
            -----------------------------------------------

[X]  Please mark your votes as in this example.

The board of directors of ISP recommends a vote FOR adoption of the Agreement
and Plan of Merger.




--------------------------------------------------------------------------------
1. Proposal to adopt the Agreement and Plan of Merger,   FOR   AGAINST   ABSTAIN
dated as of November 8, 2002, by and between
International Specialty Products Inc. and International
Specialty Products Holdings Inc. as the merger agreement
may be amended from time to time.                        [_]     [_]       [_]
--------------------------------------------------------------------------------


Please mark, sign, date and return this proxy card promptly, using the enclosed
envelope.


--------------------------  ----------    --------------------------  ----------
         SIGNATURE             DATE                SIGNATURE             DATE


NOTE: Stockholder(s) should sign above exactly as name(s) appear(s) hereon, but
minor discrepancies in such signatures will not invalidate this proxy. If more
than one stockholder, all should sign.