We offer a variety of PTFE seals and gaskets as per the user's specifications. PTFE seals are reliable, corrosion resistant, non - contaminating non-aging and can be used up to +250° C. Envelope Gaskets are named so as rubber or asbestos rings are sandwiched between PTFE flaps. These gaskets have the resilience of asbestos or rubber but have corrosion resistance of PTFE and are widely used in glass, glass-lined, carbon, porcelain or plastic equipment.