I-Line Gasket 3A Certified for sanitary-grade line process equipment Teflon® – Also known as PTFE, these chemically resistant plastic gaskets are unaffected by most corrosive liquids and gasses from -400° to 500°F EPDM – A very stable rubber-like gasket that resists heat, oxidation and aging, with flexibility at low temperatures. Working range is -60° to 300°F Viton® – Rubber gaskets providing indefinite seal from 5° to 400°F, and an excellent seal at 600°F up to 48 hours Which gasket material is suitable for your application? Consult our Compound Selection Guide. Material Specs & Statements