Which concentrate is suitable for polar solvents during product control?

Which concentrate is suitable for polar solvents during product control?

• A. Alcohol resistant concentrate.
• B. Regular protein foam.
• C. Aqueous film-forming foam.
• D. Protein foam with alcohol additive.

Answer: (A)

Alcohol-resistant concentrate is used for polar solvent fires because alcohols can quickly disrupt ordinary foam blankets. These AR foams contain additives that form a protective film and stabilize the foam on top of polar solvents, keeping the blanket intact and suppressing vapors and reignition. Regular protein foam and standard AFFF lack this resistance to alcohols, so their foam would break down when faced with polar solvents, providing poor coverage and ineffective cooling. A protein foam with an alcohol additive isn’t as reliable or widely tested for a range of polar solvents as a purpose-built alcohol-resistant concentrate. So for product control involving polar solvents, the alcohol-resistant concentrate is the safest, most effective choice.

Alcohol-resistant concentrate is used for polar solvent fires because alcohols can quickly disrupt ordinary foam blankets. These AR foams contain additives that form a protective film and stabilize the foam on top of polar solvents, keeping the blanket intact and suppressing vapors and reignition. Regular protein foam and standard AFFF lack this resistance to alcohols, so their foam would break down when faced with polar solvents, providing poor coverage and ineffective cooling. A protein foam with an alcohol additive isn’t as reliable or widely tested for a range of polar solvents as a purpose-built alcohol-resistant concentrate. So for product control involving polar solvents, the alcohol-resistant concentrate is the safest, most effective choice.