A Firefighter’s Guide to Foam

as a 3% / 6% agent. The use of a 3 x 3 AR-AFFF also simplifies setting the proportioning percentage at an incident, since it is always 3%. Overall, AR-AFFF’s are the most versatile type of foam available today, offering good burnback resistance, knockdown and high fuel tolerance on both hydrocarbon and polar solvent (or water miscible) fires. 6

  Foam, Afff