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GYLON® Style HP 3561 High Pressure Gasketing

PTFE with Barium Sulfate Gasketing for High Pressure Applications

GYLON® Style HP 3561 is high performance, barium sulfate filled PTFE gasketing material that contains a perforated 316L stainless steel insert for improved pressure resistance (can withstand up to 2,500 PSI).


  • Tight seal
  • Perforated stainless steel core increases resistance to pressure fluctuations and thermal cycling
  • GYLON® offers superior cold flow and creep resistance, eliminating the need for frequent retorquing
  • Chemical resistance
  • Seals aggressive chemicals in hostile environments where safety or blowout resistance is crucial*
  • Will not support flame
  • Will not support bacterial growth

*Consult Garlock® Applications Engineering when using flanges in pressure classes above 300lbs.


  • Available in sheet or cut gasket form
  • Off-white
  • PTFE with barium sulfate and perforated 316L stainless steel insert
  • Max. Temperature:     500°F      /       260°C
  • Max. Pressure:        2,500 PSI     /       172 bar
  • Maximum PxT 1/16:    700,000 °F x PSIG    /     25,000 bar x °C
  • Maximum PxT 1/8:        450,000 °F x PSIG   /     15,000 bar x °C


  • Caustics
  • Chlorine
  • Gases
  • Water
  • Steam
  • Hydrocarbons
  • Cryogenics
  • Aluminum fluoride
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