Lanmar #635-3 is a 3 mil PTFE coated fiberglass tape with a silicone adhesive. The woven fiberglass backing is coated with premium PTFE for a non-stick, chemically inert surface with a low coefficient of friction and excellent dimensional stability under sustained heat. This is a dependable general-purpose PTFE fiberglass tape for high-temperature release and sealing environments.

The silicone adhesive bonds securely to metal sealer bars, platens, and most industrial process surfaces, with consistent peel strength across the operating range. Rated from -100 to +500°F. Dielectric strength: 3000V. Insulation Class 220.

Specifications: 3 mil PTFE backing / 5 mil total thickness. Break strength: 70/50 lb/in. Elongation: <5. Adhesion: 40 oz/in.

Common applications include heat sealer bar wrapping, packaging equipment platen covers, conveyor belt surfaces, roll-to-roll release liner applications, and uPVC window welding. Supplied in roll form. Available custom slit to width.