Foams have the capability of recovering any gaps created by firefighters walking through and disturbing the foam layer is Aqueous film-forming foam
Fire suppressants like aqueous film-forming foam (AFFF) are used to put out flammable liquid fires like fuel fires.
AFFF is frequently employed in fire fighting apparatus, shipboard and land-based facility fire suppression systems, and fire training facilities. According to the amount of water it is mixed with, AFFF is often sold as a concentrate and is referred to as "3%" or "6%" (Type 3 or Type 6, respectively).
To avoid long-term harmful effects on human health or the environment, containment and cleanup may be necessary when AFFF is used, discharged, or released into the environment.
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