Controlled Swell Sheet


Style NA1088 is used in difficult to seal applications where inadequate bolt loading or flange surface conditions are not ideal, in low to moderate flange load conditions.

  • Petroleum and Derivatives
  • Synthetic oils
  • Aliphatic solvents
  • Mild organic acids
  • Water
  • Coolants
  • Refrigerants
  • Vegetable oils
  • Animal oils


Style NA1088 is a high density, controlled swell sheet gasket material with a proprietary binder & reinforced with a synthetic/inorganic fiber blend. It is designed for demanding applications requiring excellent sealablity, torque retention, recovery, and conformability to uneven flange surfaces. The material provides a controlled swell in the presence of oils, fuels, lubricants, and water/coolant. It is used in heavy duty & industrial oil sealing applications such as diesel engine oil pans and front covers, compressors, generators, pumps, valves, gear boxes & housings, transformer, sight glass, man/hand-hole covers. The following specification values are for 0.8mm (0.031”) gauge material.

Service Limits

Temperature ºF (ºC) Continuous Service: 400 (205)
Maximum Service: 650 (343)*
Pressure psi (bar) Continuous Service: 500 (34.5)
Maximum Service: 1000 (69)
Sheet size 59 x 63 in
Thickness 1/32", 1/16", 3/32", 1/8"
Color Beige/Off White

*Consult with Teadit Engineering. Values are based on short term and peak conditions.

Typical Physical Properties:
Density 103 lb/ft3 (1.65 g/cm3)
Compressibility - ASTM F36 7-17%
Recovery - ASTM F36 min 45%
Creep Relaxation - ASTM F38 20%
Sealability @ 500psi - ASTM F37A < 0.05 ml/h
Sealability @ 3000psi - ASTM F37B < 0.05 ml/h
ASTM F146 IRM 903 - 150ºC (300ºF) after 5h
Weight Increase 30-50%
Thickness Increase 30-50%
ASTM F146 Distilled Water - Room Temperature after 5h
Weight Increase 10-35%
Thickness Increase 10-35%
ASTM F146 Distilled Water - 100ºC (212ºF) after 22h
Weight Increase 10-35%
Thickness Increase 10-35%






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