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GYLON® Style 3505 NSF 61 Approved PTFE Gasketing

NSF 61 Approved PTFE with Aluminosilicate Microspheres Gasketing Material

The GYLON® Style 3505 gasket is a high performance, aluminosilicate microsphere filled PTFE gasketing material that is designed for use in oxygen service. GYLON® 3505 is also NSF 61-approved for use in potable water service, and an excellent choice for water lines where electrical isolation properties are necessary.


  • 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
  • Color: Blue
  • PTFE with Aluminosilicate Microspheres
  • Meets NSF 61, FDA, and USP Class VI 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


  • Potable drinking water
  • Hydrocarbons
  • Solvents
  • Many acids and some caustics
  • Refrigerants
  • Cryogenics
  • Hydrogen peroxide
  • Oxygen service
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