Phelps is a supplier of a variety of custom PTFE protected gaskets - including PTFE Bonded gaskets, as well as PTFE Envelopes. PTFE protected gaskets offer an almost universal chemical resistance, and non-contaminating gasketing solution for high-purity applications. This category of gaskets are an excellent choice for a wide range of applications, especially in the food processing, pharmaceuticals, and petrochemicals industry.