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Gylon 3565 product style is PTFE with aluminosilicate microsphere filler.


  • Soft, deformable exterior conforms to surface irregularities; ideal for worn, warped or pitted flanges
  • Stable blue core improves cold flow resistance
  • Low bolt load requirements ensure a tight seal on glass-lined or wavy flanges*
  • Direct sintering of GYLON® layers prevents leak paths and adhesive contamination
  • Unitized construction avoids jacket foldover
  • Rigid core facilitates installation of large gaskets
  • Custom-cut gaskets from large sheets offer convenience while reducing costly inventory buildup
  • Ideal replacement for slit, milled, formed shield and double jacketed envelope gaskets*

Service Media

  • Moderate Concentration of caustics
  • Moderate Concentration of acids
  • Hydrocarbons
  • solvents
  • Cryogenics
  • glass-lined equipment

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

Gylon 3565 Specifications
Min. Temperature:-450°F
Max Temperature:500°F
Max Pressure:800 (PSI)
Maximum PxT 1/16:350,000 (°F x PSIG)
Maximum PxT 1/8:250,000 (°F x PSIG)