GYLON® Style 3504

PTFE with Aluminosilicate Microspheres Gasketing

GYLON® Style 3504

Made of PTFE with aluminosilicate microspheres, the GYLON Style 3504 gasket is designed for acids, caustic hydrocarbons, refrigerants and more. Read more about this product below, and contact Gallagher Fluid Seals if you have any additional questions.

Features & Benefits

  • Tight seal
  • Improved performance over conventional PTFE
  • Reduced product loss and emissions
  • Reduced creep relaxation
  • Unique manufacturing process minimizes cold flow problems typical of skived and expanded PTFE sheets
  • Excellent bolt torque retention
  • Withstands a wide range of chemicals for extended service life in a wide variety of applications
  • Offers some of the largest sheet sizes in the industry
  • Improved material utilization reduces waste
  • Branding and color coding reduces misapplication
  • Will not burn
  • Will not support bacterial growth


  • Available in sheet or cut gasket form
  • PTFE with aluminosilicate microspheres
  • Color: Blue
  • Meets ABS, FDA and USP specifications
  • Min. Temperature:        -450°F  (-268°C)
  • Max. Temperature:         500°F  (260°C)
  • Max. Pressure:                800 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)


  • Moderate concentrations of acids and some caustics
  • Hydrocarbons
  • Solvents
  • Water
  • Refrigerants
  • Cryogenics
  • Hydrogen peroxide

For oxygen service, specify “Style 3505 for oxygen service.”

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