AFFF (Aqueous Film Forming Foam) Process high-quality foam - can be applied through a wide variety of foam delivery systems including non-aspirated nozzles - excellent flame knockdown - good burnback resistance. High Expansion Foam Effective extinguishing ability for all types of spill fires. Designed for use in both high expansion and medium expansion equpment. Alcohol-Resistant AFFF Ansulite® 3x3 low viscosity 3% concentrate: Unique to all firefighting foams - a low viscosity foam concentrate that can be applied at 3% on both hydrocarbon and polar-solvent fuels. Ansulite®Arc 3% or 6% Concentrate: Versatile firefighting foam. Designed for 3% on hydrocarbons, 6% on polar-solvent fuels. Class A Foam: Designed specifically for Class A fuels including wood, paper, coal, rubber and plastics.