FM Approved and UL Listed USP 3% SFFF foam concentrate is part of the industry’s leading FM Approved and Synthetic Fluorine Free Foam (SFFF) Fixed Foam System for Hydrocarbon and Polar Solvent applications. The concentrate is approved for use with fresh water when proportioned at 3%. Low expansion SFFF systems are comprised of various FM Approved and/or UL Listed components to establish a complete package for flammable liquid protection.