FJ21 FracJack SandGuard is a synthetic valve lubricant and sealant formulated with molybdenum disulfide and graphite to reduce friction for vigorous frac operations. The reduction of friction allows the valves to turn easily thereby extending their life and performance. FJ21 FracJack SandGuard services temperatures to >450°F (>232°C). FJ21 FracJack SandGuard adheres to metal, assuring protection against rust and corrosion. It is resistant to a variety of chemicals, including hydrogen sulfide, crude oil, hydrochloric acid, brine and water, as well as drilling muds. In addition, FJ21 FracJack SandGuard is waterproof and non-hardening.