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

GYLON® Style 3505 Benefits

  • Tighter seal – graphite-filled PTFE provides exceptional performance in comparison to conventional PTFE; achieves reduced emissions due to low void content
  • Pollutant resistance – service life is extended due to its ability to withstand volatile, hazardous pollutants (VHAP and VOC)
  • Cost savings – lowers operation costs by minimizing energy consumption, fluid loss, inventory and maintenance costs, and waste
  • Large sheet sizes – availability of some of the largest sheet sizes in the industry are offered, as well as waste reduction due to improved material utilization


GYLON® Style 3505 Material Properties

Color: Blue
Composition: PTFE with aluminosilicate microspheres
Fluid Services: Oxygen service, moderate concentrations of acids and caustics, solvents, refrigerants, cryogenics, hydrocarbons, and hydrogen peroxide
Min. Temperature: -450 (°F)
Continuous Max: 500 (°F)
Max. Pressure: 800 (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: NSF 61 (National Sanitation Foundation), FDA (Food and Drug Administration), and USP Class VI (US Pharmacopeia)