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PolySi PST-511 Silicone Grease is made with 100% silicone oil which resists water and most chemicals. This versatile, translucent grease is ideal for home use for beverage dispensers, lawn mowers, ATVs, boats, personal water crafts and snow mobile spark plugs, faucet O-rings, cartridge filters, and electrical terminals. PST-511 is dielectric grease, which prevents water from contacting electrical components and shorting out. PST-511 is a non-corrosive, protective coating that performs extremely well in high and low temperatures (-40F to 400F).