Thermoseal Klingersil C-4408 Compressed Non-Asbestos gasket sheet is manufactured with aramid fiber reinforced with a nitrile binder . (Black Sheet)

Thermoseal Klingersil C-4408 is a universal high-pressure gasket material for industrial applications. This material has a low carbon steel woven mesh insert that improves sress relaxation and makes this material suitable for fluctuating temperatures and pressures.



  • Oil resistant
  • Fuel resistant
  • Hydrocarbon resistant


KLINGERSIL C-4408 Gasket Sheets are available in these sizes:

1/64”X 60”X 60”
1/32”X 60”X 60”
1/16”X 60”X 60”
3/32”X 60”X 60”
1/8”X 60”X 60”

Note: Other thicknesses and sheet sizes may be available by special order.

Specifications (for 1/16” thick sheet):

Max Peak Temp with Liquids750°F*
Max Peak Temp with Gases & Steam450°F*
Max Operating Pressure with Liquids1,400 PSI*
Max Operating Pressure with Gases & Steam1,400 PSI*

*under suitable conditions

ASTM F104 Line Call Out: