Thermoseal Klingersil C-4409 Compressed Non-Asbestos gasket sheet is manufactured with synthetic fiber reinforced with a nitrile binder . (Green Sheet)

KLINGERSIL C-4409 has an expanded metal reinforcement. The galvanized low carbon steel insert makes this material suitable for conditions with high thermal and mechanical stress.

C-4409 is excellent in hot gases and can replace spiral wound gaskets in some applications.



KLINGERSIL C-4409 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 Liquids

790°F *

Max Peak Temp with Gases & Steam

550°F *

Max Operating Pressure with Liquids

2,400 PSI *

Max Operating Pressure with Gases & Steam

1,900 PSI *


*under suitable conditions



ASTM F104 Line Call out: 





See the data sheet PDF in this folder

1335 West 11th Street, Long Beach, CA 90813-2714

Phone: 562-435-2411 | Fax: 562-436-2140

Open to the Public Monday - Friday 8 am - 5 pm