Cork (and cork-rubber composite) compresses and conforms to irregular surfaces at low bolt loads, making it ideal for sealing large, lightly-clamped covers. It resists oil well and is a classic choice for engine covers, transformers, and electrical gaskets. We laser-cut custom cork gaskets to your exact dimensions with no minimum order and ship within one business day. Custom Cork Gasket Specifications Temperature range −40°F to 250°F Compressibility High — conforms to uneven, low-clamp-load surfaces Excellent resistance to Oils, fuels, and solvents; good sealing at low bolt torque Poor resistance to High pressure, strong acids/alkalis, and repeated flexing Thicknesses available 1/16", 1/8", 3/16", 1/4" Additional specifications and specific durometers are available on request — contact us with your requirements. Common Cork Gasket Applications Engine and valve cover gaskets Transformer and electrical equipment seals Oil-pan and low-pressure flange gaskets Sight-glass and inspection-cover seals Machinery access covers Fuel and lubrication housings When to Choose Cork Choose Cork when you need to seal a large, lightly-bolted cover with an uneven surface — its compressibility fills gaps that solid rubber cannot at low torque. For high-pressure or high-flex service, choose a fiber or elastomer gasket instead. Cork Gasket FAQs What is cork gasket material good for?Cork excels at sealing large, low-pressure, lightly-bolted covers with uneven surfaces — engine covers, transformers, and oil pans — because it compresses and conforms at low clamp loads.Does cork resist oil?Yes — cork and cork-rubber composites resist oils, fuels, and solvents well, which is why they are common in engine and lubrication applications.Can cork handle high pressure?No. Cork is best for low-pressure, low-torque sealing. For high-pressure flanges, choose a compressed fiber gasket. Enter your dimensions in the quote tool above for an instant price on custom Cork gaskets from Fastest Gaskets — no minimum order, ships in one business day. {"@context":"https://schema.org","@type":"FAQPage","mainEntity":[{"@type":"Question","name":"What is cork gasket material good for?","acceptedAnswer":{"@type":"Answer","text":"Cork excels at sealing large, low-pressure, lightly-bolted covers with uneven surfaces — engine covers, transformers, and oil pans — because it compresses and conforms at low clamp loads."}},{"@type":"Question","name":"Does cork resist oil?","acceptedAnswer":{"@type":"Answer","text":"Yes — cork and cork-rubber composites resist oils, fuels, and solvents well, which is why they are common in engine and lubrication applications."}},{"@type":"Question","name":"Can cork handle high pressure?","acceptedAnswer":{"@type":"Answer","text":"No. Cork is best for low-pressure, low-torque sealing. For high-pressure flanges, choose a compressed fiber gasket."}}]}. Large orders may take longer.
