What is indicated when using AFFF foam in firefighting?

Aqueous Film Forming Foam (AFFF) is specifically designed to tackle hydrocarbon fires, which are fires fueled by flammable liquids such as gasoline, oil, and other petroleum products. The foam creates a barrier that smothers the fire and prevents re-ignition by forming a thin film that separates the fuel from the air, effectively cutting off the oxygen supply necessary for combustion.

While AFFF is effective on hydrocarbon fires, it is also compatible with aqueous fires, but that is not its primary function. It is also important to note that AFFF does require the mixing of foam concentrate with water for optimal performance; it is not a standalone agent. Moreover, AFFF is used in various fire scenarios and is not limited to small fires, making it a versatile firefighting tool. The effectiveness of AFFF on hydrocarbon fires underscores its significance in firefighting operations, particularly those involving flammable liquids.