United 168 TEF-TEK is a high-tech, multipurpose penetrating lube that contains a Teflon® gel. It penetrates, displaces moisture, grime, grit and other spent lubricants and prevents rust and corrosion. It is more effective than conventional lubricants, leaving behind a long-lasting, super-slick film that coats metal surfaces. Works effectively in temperatures from -30°F (-34°C) to +600°F (316°C).