Can “Class A” foams be applied on flammable liquid fires?
No, AFFF and protein base foams are designed specifically for use on different types of flammable, “Class B” fires and vapor suppression, and have received approval from Underwriters Laboratories for these applications. “Class A” foams, on the other hand, are designed to work on materials of “Class A” composition that exhibit deep seated burning characteristics. “Class A” foam applications have been proven to be extremely effective not only in the suppression of wood, paper, fabric, tire, and plastic fires, but also in exposure protection for wildland control.
