ANSULITE® ARC (Alcohol-Resistant Concentrate) 3% or 6% FreezeProtected AR-AFFF (Alcohol-Resistant – Aqueous Film-Forming Foam) Concentrate is formulated from special fluorochemical and hydrocarbon surfactants, a high molecular weight polymer, and solvents. It is transported and stored as a concentrate to provide ease of use and considerable savings in weight and volume.
It is intended for use as a 3% or 6% proportioned solution (depending on the type of fuel) in fresh, salt, or hard water.
The foam concentrate may be stored at temperatures to 0 °F (–18 °C) without freezing. If stored below the minimum use temperature, freezing may occur. If frozen, the concentrate can be thawed and remixed before use.
There are three fire extinguishing mechanisms in effect when using ANSULITE ARC 3% or 6% Freeze-Protected AR-AFFF Concentrate on either a conventional Class B hydrocarbon fuel such as gasoline, diesel fuel, etc., or a Class B polar solvent (water miscible fuel) such as methyl alcohol, acetone, etc. First, an aqueous film is formed in the case of a conventional hydrocarbon fuel, or a polymeric membrane in the case of a polar solvent fuel. This film or membrane forms a barrier to help prevent the release of fuel vapor. Second, regardless of the fuel type, a foam blanket is formed which excludes oxygen and from which drains the liquids that form the film or the polymeric membrane. Third, the water content of the foam produces a cooling effect.