635 Hi-Tech is a superior synthetic valve lubricant and emergency sealant, which reduces friction during valve operation. It allows valves to turn easily, thereby extending their performance and lifespan.

635 Hi-Tech is resistant to solvents and chemicals including hydrogen disulfide, crude oil, diesel, carbon dioxide, hydrochloric acid, brine, water and condensates, as well as drilling muds. It is waterproof, non-hardening, and contains anti-wear additives. It adheres to metal to protect against rust and corrosion.

635 Hi-Tech has a temperature range of -20°F to >450°F (-29°C to >232°C).