Thermoseal RG-N120 is a reinforced cellulose gasket material with a nitrile butadiene rubber binder and inorganic fillers that provides a very good crush resistance at high flange pressures. Continuous roll lengths allow efficient and economical fabrication with high speed die cutting equipment. RG-N120 seals oil, water, and coolants well in applications such as small engine intake and cover gaskets, automotive water pump and throttle body gaskets and similar applications with intermittent operating temperatures up to 350° F (177° C).

Ref. Thickness of Measured Values

0.031" (0.8mm)

Density ASTM F1315

75 lbs/ft3 (1.20 g/cm³)

Compressibility ASTM F36J

25 - 35%

Recovery ASTM F36J

minimum 30%

Tensile Strength ASTM F152

minimum 1305 psi (9 MPa)

Fluid Resistance

After immersion in Fuel B

Weight Increase

Thickness Increase

After immersion in Oil IRM903

Weight Increase

Thickness Increase



maximum 30%

maximum 10%


maximum 40%

maximum 15%

Binder Type

Nitrile Butadiene Rubber

ASTM F104 Line Call Out


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