ASTM F104 F712220E23M5

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Comparable to

  • Durlon 8500
  • Garlock 3000
  • JW Clipper Leader Gasket 978C
  • Lamons L-441
  • Thermoseal (Klinger) C4401

Service Limits

Temperature Limits
Maximum752°F (400°C)
Continuous Max500°F (260°C)
Pressure Limits
Maximum1595 psi (110 bar)
Continuous Max725 psi (50 bar)
ASTM F104Line Call OutF712220E23M5
ColorBlue or Gray
Available Sheet Sizes
Thickness1/64", 1/32", 1/16", 3/32", 1/8"
Sheet Sizes59" x 63"
59" x 126"

Typical Physical Properties

ASTM Test MethodPropertyValue
-Density119.5 lb/ft^3 (1.92 gm/cc)
F36Recoverymin 50%
F152Tensile Strength1820 psi (12.5 N/mm^2)
F495Ignition LossMax 26%
F146Thickness Increase After 5 Hour Immersion
-ASTM IRM 903 @ 300°F (150°C)Max 15%
-ASTM Fuel B @ 77°F (25°C)Max 15%
F136Weight Increase After 5 Hour Immersion
-ASTM IRM 903 @ 300°F (150°C)Max 15%
-ASTM Fuel B @ 77°F (25°C)Max 15%
F38Creep Relaxation22%
-Torque Retention (DIN 52913)37 N/mm^2
F37Sealibility at 1000 psi0.2 ml/h


Style NA1081 is a compressed non-asbestos sheet gasket material produced from a combination of DuPont Kevlar®, Inorganic Fillers and bonded with Nitrile Rubber (NBR).It is manufactured under rigorous quality control standards that are registered under ISO-9001 certification.

Application / Service

Style NA1081 has numerous applications in the process industries handling media like: mild acids and alkalis, water, hydrocarbons, oils, gasoline, steam, air, industrial gases, general chemicals, neutral solutions.

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