Mobile Fire Extinguishers are produced specifcally for use with Aqueous Film Forming Foam (AFFF 6%) which is remarkably effective when fighting Class B (flammable fuel) fires. The unique section of AFFF stems from it's ability to make water float on flammable fuels.

The flame quenching foam blanket rapidly spreads over the surface of the fuel and the aqueous solution floats over the surface to provide a vapour seal. This aqueous film foaming action enhances the extinguishment and prevents reflash of the fuel.