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Chemguard FS-257 is a 30% actives proprietary amphoteric fluorosurfactant blend imparting excellent foaming and burn-back characteristics in the preparation of highly fluorine efficient AFFF agents. It is compatible with anionic, cationic, amphoteric and nonionic hydrocarbon or fluorochemical surfactants. It provides excellent performance in AFFF, FFFP, AR-AFFF, and AR-FFFP formulations.