Fire Safety Science Digital Archive

At the request of the Defence Materials Standardization Committee, laboratory tests have been made to provide information on the compatibility of fluorochemical and protein foams. The foams were applied gently to the surface of 0.28 m^2 (3 ft^2) fires of petrol having a boiling range of 62 - 68 °C. Experiments were made with foams made from mixtures of the two liquids in various proportions and with the two foams applied consecutively. No reduction in control and extinction performance was found when the two foam liquids were used together, but the protection from re-ignition and repropagation was reduced.