DuPont Penetrant with Teflon Fluoropolymer is a high-performance formula designed to quickly break down rust to free seized parts. Use on any moving part requiring lubrication to prevent sticking, rusting, squeaking or binding: hinges, chains, springs, cables, doors, tracks, wheels, windows, locks, latches, conveyor rollers, hitches, winches, gates, tools, blades, threaded parts, pulleys, and more. Also use for extreme rust and corrosion protection- lubricant passes over 1000 hours ASTM D-1748 Humidity Cabinet Rust Test. Use for long-term rust protection even in salt air environments. Formulated with Teflon to help free parts more easily. Lubricant withstands ‐30°F to 350° F.