- Aqueous Film-Forming Foam ("AFFF")
Aqueous Film-Forming Foam ("AFFF") is a specialised fire-fighting foam concentrate used for suppressing hydrocarbon fuel vapors of Class B fires. It consists of fluorinated surfactants and foam stabilizers, which create a fluid aqueous film. AFFF is typically diluted with water to concentrations of 1%, 3%, or 6% to make a foam solution. It forms a protective film that quickly extinguishes flames and prevents re-ignition, making it an effective solution for combating flammable liquid fires.