Foam fire extinguishers can also be referred to as AFFF extinguishers due to the aqueous film foaming foam that it propels.
These fire extinguishers are used for class A and class B fires which can contain wood, paper, plastic, petrol or paint.
It is easy to identify a foam fire extinguisher by the blue band that runs around the top of the all red cylinder.
When a foam fire extinguisher is used to put out a fire it removes the element of oxygen by smothering the fire as well as creating a cooling effect and reducing the likelihood of the fire reuniting.
Foam fire extinguishers are generally used within warehouse’s, petrol stations and storage facilities and are not recommended for use on class F fires (fires involving cooking oils and fats).
You will find more information on foam fire extinguishers in detail here.