Hi-tech Polymers supplies Polytetrafluoroethylene - PTFE Envelope Gasket in Slit Form. Hi-tech Polymers manufactures PTFE components for petrochemicals, refineries, fertilizers, power, marine, aerospace industries etc. Polytetrafluoroethylene - PTFE Envelope Gasket in Slit Form is used in chemical plants, glass lined equipment etc, due to their high temperature, corrosion and ageing resistance. Polytetrafluoroethylene - PTFE Envelope Gasket in Slit Form is also available in milled form. These are available in the size of 12mm onwards and are also provided in oval shapes and in bigger sizes.