PTFE filler tape for Spiral Wound Gaskets is a engineered sealing material manufactured from 100% virgin or expanded PTFE. Designed to be wound between V-shaped metal strips as a highly compressible core, it is one of high temperature& low resistance spiral wound gasket material for clear working condition.It has good sealability and flexibility, it is simple to cut and install, the tape will not age, harden, shrink or dry out in service.