Foam Extinguisher Sign | AGO Fire & Rescue

Foam Extinguishers:

Foam extinguishers are now the go-to over water as they can extinguish Class A fires, like water, along with Class B fires. Class B fires involve flammable liquid, petrol, oil etc. This extinguisher attacks the fire on two sides of the fire triangle. It extinguishes by building up on the surface of the burning material suffocating the fire and cutting of the oxygen, whilst also cooling the hot material.