TESLON Expanded PTFE Sheet consists of 100% Virgin PTFE. The manufacturing process produces a multidirectional fibrous texture which gives the material its special properties. This creates a soft and pliable, yet very tough gasket that has excellent resistance of pressing, creep relaxation and cold flow. It can seal the uneven and damaged flanges. TESLON Expanded PTFE sheet is a soft highly compressible sealing material.