Which foam type is designed to be alcohol-resistant?

Which foam type is designed to be alcohol-resistant?

• A. Aqueous Film-Forming Foam (AFFF)
• B. Alcohol-Resistant Concentrates
• C. Fluoroprotein Foam
• D. Protein Foam

Answer: (B)

Fires involving alcohols or other polar solvents challenge foam blankets because alcohols can break down the foam film that keeps the blanket stable. The foam type designed to withstand that is alcohol-resistant concentrates. These formulations include special ingredients that form a durable surface barrier and maintain foam stability even when alcohols are present, allowing the foam to blanket the liquid, cool it, and separate the fuel from the air. In contrast, standard hydrocarbon-focused foams like AFFF, fluoroprotein, or protein foams tend to lose their effectiveness in the presence of alcohols, because the polar solvent disrupts the foam film and reduces coverage and cooling. Therefore, when alcohol or polar solvents are involved, alcohol-resistant concentrates are the appropriate choice.

Fires involving alcohols or other polar solvents challenge foam blankets because alcohols can break down the foam film that keeps the blanket stable. The foam type designed to withstand that is alcohol-resistant concentrates. These formulations include special ingredients that form a durable surface barrier and maintain foam stability even when alcohols are present, allowing the foam to blanket the liquid, cool it, and separate the fuel from the air. In contrast, standard hydrocarbon-focused foams like AFFF, fluoroprotein, or protein foams tend to lose their effectiveness in the presence of alcohols, because the polar solvent disrupts the foam film and reduces coverage and cooling. Therefore, when alcohol or polar solvents are involved, alcohol-resistant concentrates are the appropriate choice.