GYLON®, a product of Garlock Sealing Technologies, is a reinforced PTFE gasketing material that offers significantly reduced creep relaxation, cold flow, and excellent chemical resistance, along with easy identification due to branding and color coding.

GYLON® Style 3545 Benefits

  • Tighter seal – highly compressible PTFE outer layers seal under low bolt load, while also conforming to surface irregularities such as pitted, scratched and warped flanges
  • Excellent chemical resistance – service life is extended due to its ability to withstand a broad range of chemicals
  • Easy cutting – soft PTFE can be easily cut from larger sheets, lowering inventory costs and costly downtime
  • Effortless installation –  rigid PTFE core is an asset, particularly on large diameter flanges or areas that are difficult to reach

Garlock GYLON® vs PTFE Permeation Chart

Garlock GYLON® vs PTFE Bolt Load Chart

GYLON® Style 3545 Material Properties

Color: White
Composition: Microcellular PTFE
Fluid Services: Strong caustics, strong acids, chlorine, hydrocarbons, cryogenics, glass-lined equipment, and low bolt load applications
Min. Temperature: -450 (°F)
Continuous Max: 500 (°F)
Max. Pressure: 1,200 (PSI)
Maximum PxT 1/16: 350,000 (°F x PSIG)
Maximum PxT 1/8: 250,000 (°F x PSIG)
Flammability: Will Not Burn
Bacterial Growth: Will Not Support
Meets Specification: ABS (American Bureau of Shipping), FDA (Food and Drug Administration)