CHEMGUARD 6% AFFF is a specially formulated, synthetic, aqueous film forming foam concentrate. A vapor suppressing aqueous film is formed by the foam solution draining from the expanded foam blanket. It is intended for use at a proportioning rate of 6% (6 parts AFFF concentrate to 94 parts water) on Class B hydrocarbon type fuels such as gasoline, kerosene, diesel, etc. CHEMGUARD 6% AFFF is not intended for use on fuels, which are polar solvent/water miscible such as alcohols, ketones, esters, etc. 2-Features U.L. Listed, Foam Liquid Concentrates. U.L. Canada Listed. Performance to ICAO, Doc. # 9137, Part 1, Chapter 8, Level “B” verified. U.L. recommended application rate on hydrocarbon type fuel is .10/gpm ft². Suitable for use with either fresh or salt water. Excellent wetting characteristics when used in combating Class “A” fuel fires. Suitable for use with both air-aspirating foam and standard water fog nozzles. Suitable for use with deluge or closed head foam water sprinkler systems. If inadvertently frozen, thawing will render product completely serviceable again. Suitable for use with dry chemical extinguishing agents . Suitable for use with carbon steel, fiberglass, polyethylene or stainless steel. 3-Chemguard 6% AFFF is not compatible with galvanized pipe or fittings in an undiluted form.