Are “Class A” foams the same as wetting agents, like the old Fire-Out?
No, “Class A” foams, though similar to wetting agents, are true foaming concentrates. They may be proportioned and applied in aspirated form to create a thick white, long lasting protective blanket, or in unaspirated form, as a water wetting and penetrating agent. By the choice of concentrate proportion ratio and nozzle model, a wide variety of foam consistencies may be achieved for different applications.
