Which foam is designed to be effective against polar solvents?

The foam designed to be effective against polar solvents is alcohol-resistant foam. This type of foam is specifically formulated to combat the challenges posed by polar solvents, which are substances like alcohols that can break down regular foam types and diminish their effectiveness in suppressing fires. Alcohol-resistant foam contains special additives that help it maintain its structural integrity and performance even in the presence of polar solvents.

When polar solvents ignite, they may create unique fire behavior and hazards that require specific firefighting agents. Alcohol-resistant foam works by forming a barrier that seals off the fuel from the air, reducing the chances of reignition and effectively suppressing the flames. Its unique properties make it a vital tool for firefighting in environments where such solvents are present.

This makes alcohol-resistant foam the appropriate choice for extinguishing fires involving polar solvents, whereas other types of foam, such as protein foam or aqueous film-forming foam, may not provide the necessary protection against these types of flammable liquids.