Gasket Materials
Guide
Every gasket we sell is built from verified, tested material. This guide breaks down what each material is, how it's constructed, and what testing backs it up — so you know exactly what you're putting in your engine.
Material Profiles
9 materialsCellulosic Fiber Gasket Material
Asbestos-free composite of cellulosic and thermoresistant fibers bonded with NBR rubber. Designed for cylinder head gaskets in gasoline and diesel engines.
FKM Rubber on Stainless Steel — High Heat Grade
FKM (Viton) rubber coating on full-hard stainless steel core with graphite surface treatment. Built for automotive head gasket applications requiring maximum heat and fluid resistance.
Cold Rolled Stainless Steel
Full-hard austenitic stainless steel strip produced to JIS G 4313. Used as the structural metal core in multi-layer and metallic gaskets — providing high spring-back and fatigue resistance.
FKM (Viton) Rubber
Premium fluorocarbon rubber with outstanding heat, oil, and chemical resistance. Used as the rubber coating on metallic gaskets and as sealing material in demanding engine environments.
Foam Rubber on Steel Core
Foamed rubber surface bonded to an SPCC steel core with graphite coating. The foam layer absorbs flange roughness and seals at low pressures — ideal where surface finish isn't perfect.
NBR Rubber on Steel
Nitrile (NBR) rubber coating bonded to cold rolled steel core. A versatile general-purpose gasket material with strong resistance to oils, coolants, and transmission fluids.
FKM Rubber on Stainless Steel
FKM (Viton) rubber coating on SAE 301 full-hard stainless steel. Rated to 200°C for 500 hours with no loss of adhesion — the highest heat and fluid resistance in our lineup.
Foamet Sponge Rubber Sheet / Metal Core
NBR foamed rubber coating bonded to a cold rolled steel core. The sponge surface conforms to irregular flanges and seals at low clamp loads — ideal where surface finish isn't perfect.
NBR Rubber-Graphite Coated Steel
NBR rubber coating on SPCC-4 cold-rolled carbon steel core with graphite surface treatment. Oil, fuel, and coolant resistant — built for standard automotive engine gasket applications.
How We Test
Heat Resistance
Materials are exposed to sustained high temperatures to verify they maintain structural integrity, hardness, and sealing performance under real engine conditions.
Fluid Resistance
Gasket materials are submerged in engine oil, fuel, coolant, ATF, and PAG oil. Weight and thickness change are measured to confirm the material won't swell or degrade in use.
Compressibility & Recovery
Measures how much a gasket compresses under bolt load and how much it springs back. Critical for maintaining a reliable seal without blowing out or going flat over time.
Creep Relaxation
Tests how much a material permanently loses clamping load over time at elevated temperatures — a key indicator of long-term sealing reliability in hot engine environments.
Tensile Strength
Both the metal core and rubber coating are tested for tensile and elongation properties. Ensures the gasket can withstand clamp loads and thermal cycling without tearing.
Rubber-to-Metal Bond
For coated metal gaskets, the bond between the rubber layer and the metal core is tested for integrity against solvents, water, and coolant to ensure the coating won't delaminate.