During active foam expansion, a single water drop is distributed across multiple foam bubbles, which results in a larger surface area for heat absorption. Furthermore, the CAF foam sticks to the flammable material thanks to its homogeneous structure and thus enables continuous heat absorption. As a result, a large part of the water bound in the CAF is able to evaporate, thus providing maximum cooling at the seat of the fire.
The oxygen is displaced from the flammable material through evaporation of the water. Additionally, a natural separating layer is created between the flammable material and the oxygen as a result of the CAF. Thus the oxygen supply to the seat of the fire is interrupted in the best possible way.
Due to the high kinetic energy of the CAF foam and the reduction of surface tension through the added foam compound, water can penetrate deeper into the flammable material and thus soak in better.