HD AFFF 3-C6 is a synthetic Aqueous Film Forming Foam concentrate, specially formulated with new generation C6 based fluorinated surfactants which are environmentally safer. HD AFFF 3-C6 is formulated with C6 based fluorinated surfactants, hydrocarbon surfactants and solvents. It produces a thin yet strong film on Hydrocarbon fuel surface, sealing the surface and preventing fuel vapour release. The foam spreads rapidly on fuel surface due to positive spreading provided by fluoro surfactants while the foam blanket excludes oxygen from the fuel surface and provides cooling effect leading to fast flame knockdown and extinguishment. HD AFFF 3-C6 is intended for use at 3% solution in fresh, sea/salt or hard water.