Wet chemical fire extinguishera are ideal for class F fires, involving cooking oils and fats, such as lard, olive oil, sunflower oil, maize oil and butter. They are extremely effective as the wet chemical rapidly knocks the flames out, cools the burning oil and chemically reacts to produce a soap-like solution, sealing the surface and preventing re-ignition.This type of extinguisher is easy to use, producing a gentle, but highly effective spray. The gentle application helps prevent hot oil splashing on to the user. An added benefit is that it is also suitable for freely burning materials (class A) such as wood, paper and fabrics.