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PTFE Gasket Envelopes

Hennig Gasket & Seals provides 100+ years of experience in manufacturing custom PTFE gasket envelopes (as well as other PTFE gaskets) in any size, thickness, and any specially shaped configuration.  Our in-house capabilities of water jet cutting, flash cutting & die cutting along with skilled technicians provide manufacturing solutions that will guarantee you are provided on-time delivery of high performing PTFE gasket envelopes.

Our facility is arranged for JIT delivery and produciton of single prototype quantity to large scale production runs.

PTFE Gasket Envelope Applications

PTFE envelope pipe gaskets are fabricated with a PTFE protective covering envelope.  The advantages of this configuration include excellent resilience, outstanding mechanical strength and superb bolt retention.  These attributes are attained due to the chemical resistance characteristics of PTFE compressed sheet.  These features make PTE gakset envelopes suitable for:

  • General Purpose Glass Lined Equipment
  • Pharmaceutical
  • Piping Services
  • Food
  • Chemical & Petrochemical

PTFE Gasket Envelope Material

Hennig Gasket & Seals is a distributor of PTFE (polytetrafluoroethylene) material.  Considered to be one of the most commonly available gasket materials in the marketplace today, we offer the following solid sheets (virgin PTFE), skived, reinforced and 100% expanded PTFE material:

GYLON Style 3500 (fawn color) reinforced PTFE with silica filler.  Resistent to:  Strong acids (except hydrofluoric), solvents, hydrocarbons, water, steam, chlorine, and cryogenics.  Conforms to FDA regulations.

GYLON Style 3504 (blue color) reinforced PTFE with glass microspheres.  Resistent to:  Moderate concentrations of acids and some caustics, hydrocarbons, solvents, water, refrigerants, and cryogenics.  Conforms to FDA regulations.

GYLON Style 3510 (off-white color) reinforced PTFE with barium sulfate filler.  Resistent to:  Strong caustics, moderate acides, chlorine, gases, water, steam, hydrocarbons, and aluminum fluoride Conforms to FDA regulations.


The experienced team at Hennig Gasket can assist you with all your custom PTFE gaskets and seals needs – contact us today to experience our fast service. Or, request a quote today!