Which type of foam is effective on polar solvents?

Alcohol-resistant foam is specifically designed to combat fires involving polar solvents, which are typically water-miscible and can be difficult to suppress with standard foams. This type of foam contains additives that allow it to prevent the polar solvent from dissolving the foam, thereby maintaining its effectiveness as a barrier to flame and heat.

Polar solvents can absorb regular foam, which can lead to fire re-ignition and reduced suppression efficiency. Alcohol-resistant foam forms a protective film that not only separates the fuel from oxygen but also prevents the liquid from breaking down the foam structure. This is vital in achieving effective suppression of fuels like alcohols and other polar solvents, ensuring safety and efficacy in managing these challenging fire scenarios.