Abstract: Certain fluorocarbon surfactants combined with certain silicone surfactants provide mixtures that reduce the surface tension of water to 19 dynes or less per centimeter, and when foamed are particularly effective in fighting fires involving lighter-than-water hydrophobic liquids. Mixtures are further improved with certain other surfactants and use less of the fluorocarbon surfactants to provide fire fighting effectiveness of prior art compositions which do not contain silicone surfactants. Hydrophilic resins and sequestering agents can also be contained in the mixtures.