GYLON® Style 3545

Microcellular PTFE Gasketing for Low Bolt Load Applications

The GYLON® Style 3545 is a highly compressible microcellular PTFE with a rigid PTFE core for improved handlability. The GYLON® 3545 designed to compress and conform to irregular or damaged surfaces, making it suitable for flanges that generate lower compressive stresses, such and glass-lined flanges and equipment.



Features & Benefits

  • Tight seal
  • Highly compressible PTFE outer layers seal under low bolt load
  • Compressible layers conform to irregularities, especially on warped, pitted, or scratched flanges
  • Rigid PTFE core reduces cold flow and creep
  • Withstands a wide range of chemicals
  • Can be cut from larger sheets, reducing inventory costs and expensive downtime
  • Rigid PTFE core facilitates installation, especially on large diameter flanges and hard-to-reach areas
  • Will not support flame
  • Will not support bacterial growth


  • Available in sheet or cut gasket form
  • White
  • Microcellular PTFE
  • Conforms to FDA regulations and ABS specification
  • Min. Temperature: -450°F / -268°C
  • Max. Temperature: 500°F / 260°C
  • Max. Pressure: 1200 PSI / 55 bar
  • Maximum PxT 1/16: 350,000 °F x PSIG / 12,000 bar x °C
  • Maximum PxT 1/8: 250,000 °F x PSIG / 8,600 bar x °C


  • Strong caustics
  • Strong acids
  • Hydrocarbons
  • Chlorine
  • Cryogenics
  • Glass-lined equipment†
  • Low bolt load applications*

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

† When sealing uneven flanges, gasket must be four times thicker than maximum gap between flanges.

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