Lubricant designed to perform in high-temperature or hazardous hydraulic applications. Three common types of fire-resistant fluids are: (1) water-petroleum oil emulsions, in which the water prevents burning of the petroleum constituent; (2) water-glycol fluids; and (3) non-aqueous fluids with low heat of combustion, such as polyol esters, phosphate esters, silicones, and halogenated hydrocarbon-type fluids.