Former Attorney General of Louisiana Charles C. Foti, Jr., Esq. and the law firm of Kahn Swick & Foti, LLC (“KSF”) are investigating the proposed merger of Flexible Solutions International, Inc. (“FSI”) (NYSE: FSI) with Lygos, Inc. pursuant to which each outstanding share of Lygos capital stock will be converted solely into the right to receive a number of common shares of FSI. KSF is seeking to determine whether the merger and the process that led to it are adequate, or whether the merger undervalues FSI.

If you believe that this transaction undervalues the Company and/or if you would like to discuss your legal rights regarding the proposed sale, you may, without obligation or cost to you, e-mail or call KSF Managing Partner Lewis S. Kahn (lewis.kahn@ksfcounsel.com) toll free at any time at 855-768-1857, or visit https://www.ksfcounsel.com/cases/nyse-fsi/ to learn more.

To learn more about KSF, whose partners include the Former Louisiana Attorney General, visit www.ksfcounsel.com.

Kahn Swick & Foti, LLC

1100 Poydras St., Suite 3200

New Orleans, LA 70163

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