I used to volunteer with a rural Fire Department years ago, & for fighting structure fires with the hazard of liquid flammables/chemicals, we used something called 'AFFF=Aqueous Film Forming Foam' it's an organic animal-based thick liquid that when mixed with water in a foam generator will make enormous amounts of thick foam. It smells like hell, but it's basically a liquid protein designed to expand and become substantial. It's also a great liquid fertilizer, ''you ever notice that around fire station houses-they always have great gardens'' 'BUT IT HAS!!! TO BE AN ANIMAL-BASED [AFFF] ONLY! NO SYNTHETICS AT ALL!' you could wreck your soil otherwise! They use this around airports a lot, when a crash-landing is imminent they will lay down a blanket of foam for safety reasons. In the industry they call it ''A-Triple F.''