ANSULITE 3×3 Low Viscosity Ar-AFFF Concentrate Superior firefighting performance on Class B fuel fires. Used as 3% concentrate on BOTH hydrocarbon fuels such as gasoline, fuel oil, etc., and polar solvent (water miscible) fuels such as methyl alcohol, acetone, MTBE, etc. Low viscosity formula enhances perform ance with in-line eductors, balanced pres sure systems and built-in systems on firefighting vehicles. Aspirated or non aspirated discharge devices. 3% solution in fresh, salt or hard water. 3% premix in fresh water. UL Listed, FM and USCG Approved.