These type of foams do not contain any fluorine or silicon. Also, they have a great wetting capability in very low concentration, allowing getting into solid substrates (wood, cardboard…) accelerating the extinguishing process and reinforcing the resistance to reignition. They are specially indicated to be used in CAFS (Compressed Air Foam Systems), obtaining very uniform and wet foam (Expansion Ratio 1-10) as well as dry foam (Expansion Ratio 10-20). Fast cooling and a very low environmental impact make them ideal for fighting urban fires.