<P> Silicone grease is a waterproof grease made by combining a silicone oil with a thickener . Most commonly, the silicone oil is polydimethylsiloxane (PDMS) and the thickener is amorphous fumed silica . Using this formulation, silicone grease is a translucent white viscous paste, with exact properties dependent on the type and proportion of the components . More specialized silicone greases are made from fluorinated silicones or, for low temperature applications, PDMS containing some phenyl substituents in place of methyl groups . For food applications, the thickener is calcium stearate . For applications involving highly reactive substances, powdered polytetrafluorethylene (PTFE) is the thickener . </P> <P> Silicone grease is commonly used for lubricating and preserving rubber parts, such as O - rings . Additionally, silicone grease does not swell or soften the rubber, which can be a problem with hydrocarbon based greases . It functions well as a corrosion - inhibitor and lubricant for purposes that require a thicker lubricant . </P> <P> Thermal grease often consists of a silicone grease base, along with added thermally conductive fillers . It is used for heat transfer abilities, rather than friction reduction . </P> <P> Special versions of silicone grease are also used widely by the plumbing industry in faucets and seals, as well as dental equipment . These special versions are formulated using components not known to be an ingestion hazard . Electrical utilities use silicone grease to lubricate separable elbows on lines which must endure high temperatures . Silicone greases generally have an operating temperature range of approximately − 40 to 200 ° C (− 40 to 392 ° F) with some high - temperature versions extending that range slightly . </P>

Is dielectric grease the same as bulb grease