A mixture of water, foam concentrate, and air that produces a thick, bubbly blanket. It is primarily used on Class B flammable liquid fires to separate the fuel from oxygen and suppress explosive vapors, or in Class A applications to break water's surface tension and soak deeply into ordinary combustibles.
Heard on the job
We've a fuel spill spreading toward the drain, pull the foam line and blanket it.
Also heard as
- AFFF
- Class A foam
- Class B foam