... Built to Withstand Harsh Environments. Available in materials of PTFE, Nylon, and Solid Rubber,. PTFE Gasket Temperature: –400 to 500 degrees ... Processing, Food, Pharmaceutical, Aerospace and Telecommunications Industries. Material Available: PTFE, NYLON, PU, PVC, Urethane, Expanded PTFE, NBR, Gum Rubber, EPDM, Silicon, Asbestos ...