AFFF film foaming liquid is a mixture of chemical compounds and artificial foaming agent, which, like FFFP film foaming liquid, extinguishes the fire by forming a very resistant film layer on the surface of the fuel and as a result of increasing the extinguishing speed. This film is a thin layer of foam solution that is quickly spread on the hydrocarbon fuel surface and by reducing the surface tension of the foam solution, it covers the hydrocarbon surface well and extinguishes the fire in a short period of time.

The high fluidity of AFFF foam allows it to flow quickly around obstacles, but due to the chemical structure of this type of foam, its stability and resistance to re-ignition is low.