FireBULL F3 Firefighting Foam achieves ICAO Level B Certification. This is in addition to the UL162 certification. FireBULL F3 is the only firefighting foam that is 100% Acid & Fluorine free. The only F3 that has Vapor Barrier properties FireBULL is proven to be a superior firefighting foam. It will not clog, gum or corrode foam systems and equipment. ZERO hazardous materials in the formulation