Garlock Gylon Gasket Material Style 3540

Style 3540

Microcellular PTFE Gasketing


Tighter seal

  • Highly compressible PTFE seals under low bolt load- suitable for many non-metallic flanges*
  • Compressible material conforms to surface irregularities, especially on warped, pitted or scratched flanges
  • Reduced cold flow and creep normally associated with conventional PTFE gaskets

Excellent chemical compatibility

  • Pure PTFE withstands a wide range of chemicals

Easy to cut and install

  • Soft PTFE can be cut easily from larger sheets, reducing inventory costs and expensive downtime


  • Strong caustics, strong acids, hydrocarbons, chlorine, cryogenics, glasslined equipment

*For flat face flanges, a minimum compressive stress of 1,500psi is recommended on the contacted gasket area for 150psig liquid service. Consult with the flange manufacturer to confirm that adequate compressive stress is available.

Min. Temperature:-450°F (-268°C)
Continuous Max:+500°F (+260°C)
Max Pressure:1200 psig (83 bar)
Maximum PxT 1/16:350,000 (°F x PSIG)
Maximum PxT 1/8:250,000 (°F x PSIG)
ASTM F104F419000A9B2(3)


[text-with-icon icon_type=”font_icon” icon=”icon-download” color=”Accent-Color”]Gylon® Style 3540 Data Sheet[/text-with-icon]