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GRAPH-LOCK® 3125TC Flexible Graphite Gasketing

Mechanically bonded graphite sheet with a 316SS tang insert

Purified natural graphite flake that have been acid washed, expanded under heat, and then compressed into sheets with a minimum graphite content of 98%. The graphite is mechanically bonded to a 0.004” thick 316 stainless steel tang insert (53 tangs/sq in.). 


  • Excellent resistance
  • Pure exfoliated graphite flake material excels in extreme conditions, withstanding heat, pressure, and aggressive chemicals
  • Proven fire-safe
  • Reliable
  • Seals easily under moderate bolt load, offers superior torque retention
  • Retains dimensional stability in high temperatures; seals tightly even during pressure fluctuations


  • Available in sheet and cut gasket form
  • Min. Temperature:            -400°F       /     -240°C
  • Max. Temperature:            850°F       /     454°C
  • Max. Pressure:            2,000 PSI        /    138 bar
  • Maximum PxT 1/16:        700,000 (°F x PSIG)  /  25,000 bar x °C
  • Maximum PxT 1/8:            350,000 (°F x PSIG)  /  12,000 bar x °C
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