Isolast® is a perfluoroelastomer that combines the elastic properties of fluorocarbon (FKM) with the outstanding chemical resistance and the high temperature stability of Polytetrafluoroethylene (PTFE). Isolast® seals can be used for applications in high temperature service up to approximately +325°C. Isolast® O-Rings are available in metric and inch dimensions to ISO 3601, AS 568 B, BS 1806 and BS 4518, cords, foils, molded slabs and custom molded parts.