Custom EPDM Gaskets — Weather, UV & Water Resistant EPDM (Ethylene Propylene Diene Monomer) is the go-to rubber for outdoor, HVAC, and water-service applications. It holds up exceptionally well against UV exposure, ozone, weathering, and water — which is why it’s standard in rooftop equipment, irrigation systems, pump housings, and building envelope sealing. See the full materials guide for comparisons across rubber types. EPDM is the best rubber gasket material for outdoor, UV, ozone and water exposure — not for petroleum oils. Fastest Gaskets CNC cuts (laser, waterjet, and more) custom EPDM gaskets to ±0.015″. Instant quote, no minimum, ships in one business day. Large orders may take longer. What EPDM is good for Excellent UV and ozone resistance — won’t crack or harden outdoors Rated for water, steam, and mild acids; resists swelling in most aqueous environments Temperature range: -65°F to +300°F Available in 1/32", 1/16", 3/32", 1/8", 3/16", and 1/4" thicknesses EPDM is not recommended for petroleum oils, gasoline, or hydrocarbon-based fluids — for those applications, Buna-N (nitrile) or neoprene is the better choice. Common EPDM gasket applications HVAC equipment and ductwork flanges Plumbing and irrigation fittings Outdoor electrical enclosures Pool and spa equipment Rainwater harvesting systems EPDM vs neoprene vs silicone EPDM — best when the job is outdoor / UV / ozone / water (not oil) Neoprene — general-purpose when you need a balance of oil + weather Silicone — high-temp / food-grade path Point yourself to the materials guide for the full comparison table. Shapes available Ring gaskets (OD/ID) Rectangular gaskets Flange gaskets with bolt holes Disc gaskets DXF upload for custom outlines Not sure how to take dimensions? Start with our measuring guide. How to order: Enter your dimensions above for an instant price. We CNC cut (laser, waterjet, and more) your gasket from sheet stock and ship in one business day from Orange, CA. Large orders may take longer. Frequently asked questions What’s the difference between EPDM 40 and EPDM 60?The number refers to durometer (hardness). EPDM 40 is softer and conforms more easily to uneven surfaces. EPDM 60 is firmer and holds shape better under bolt load. Our standard stock is 60A durometer, which suits most general-purpose applications. Can I order a custom shape from a drawing?Yes — use the DXF upload page to upload your file and get an instant price on any custom shape. What tolerances do you cut to?We CNC cut (laser, waterjet, and more) to ±0.015" on most materials and thicknesses. Related Materials guide Measuring guide Flange gasket with bolt holes Ring gaskets Rectangular gaskets Disc gaskets Neoprene gaskets Silicone gaskets Buna-N gaskets Viton gaskets DXF upload {"@context":"https://schema.org","@type":"FAQPage","mainEntity":[{"@type":"Question","name":"What’s the difference between EPDM 40 and EPDM 60?","acceptedAnswer":{"@type":"Answer","text":"The number refers to durometer (hardness). EPDM 40 is softer and conforms more easily to uneven surfaces. EPDM 60 is firmer and holds shape better under bolt load. Our standard stock is 60A durometer, which suits most general-purpose applications."}},{"@type":"Question","name":"Can I order a custom shape from a drawing?","acceptedAnswer":{"@type":"Answer","text":"Yes — use the DXF upload page to upload your file and get an instant price on any custom shape."}},{"@type":"Question","name":"What tolerances do you cut to?","acceptedAnswer":{"@type":"Answer","text":"We CNC cut (laser, waterjet, and more) to ±0.015\" on most materials and thicknesses."}}]}
