{"product_id":"mr-o-ring-144-epdm-o-ring-70a-durometer-2-1-2-in-id-pack-of-100","title":"Mr O-Ring 144 EPDM O-Ring 70A Durometer 2-1\/2 in ID Pack of 100","description":"\u003cp\u003eIn this review the Mr O-Ring 144 EPDM O-Ring pack is judged on durability and versatility for common sealing tasks; it is best for technicians and hobbyists who need a reliable, weather-resistant seal in quantity. The reviewer found the 70A durometer EPDM compound provides a firm but flexible seal across a wide temperature span, and the pack of 100 offers obvious value for repetitive maintenance or production use. For anyone needing consistent AS568-equivalent sizing and resistance to ozone, sunlight and many dilute chemicals, this kit solves everyday sealing needs without fuss.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial and Durometer:\u003c\/strong\u003e 70A EPDM compound balances elasticity and firmness so seals remain pliable without extruding under light compression.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize Accuracy:\u003c\/strong\u003e Nominal and actual dimensions are listed, which helps installers choose a close fit for existing grooves and housings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChemical Resistance:\u003c\/strong\u003e Good performance in alcohols, dilute acids and alkalis, brake fluid and many polar solvents reduces unexpected failures in mixed-fluid environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e Rated from -55C to 125C, making these o-rings suitable for both low-temperature flexibility and many warm service applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity Pack:\u003c\/strong\u003e Pack of 100 delivers cost-effective coverage for maintenance shops and repeated replacement schedules.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShelf Stability:\u003c\/strong\u003e An unlimited shelf-life claim means spares can be stored without worry about premature degradation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThese o-rings are aimed at maintenance technicians, plumbing or hydraulic service teams and DIYers who need a large supply of consistent, weather-resistant seals. The 70A hardness and EPDM chemistry suit outdoor equipment, water systems, steam applications and many automotive or industrial uses where ozone, sunlight and age resistance matter.\u003c\/p\u003e\n\u003cp\u003eThose who need oil-specific elastomers (for prolonged contact with petroleum-based lubricants) or extremely high-temperature silicone compatibility should look elsewhere, since EPDM is optimized for polar fluids and has different limits than specialty rubber compounds.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDurable EPDM compound resists ozone, sunlight and weathering for outdoor or exposed seals.\u003c\/li\u003e\n\u003cli\u003eWide operating temperature range keeps flexibility at low temperatures and stability in warm service.\u003c\/li\u003e\n\u003cli\u003ePack of 100 provides economical spares for shops and repeat repairs.\u003c\/li\u003e\n\u003cli\u003eClear actual and metric dimensions make selection and cross-referencing straightforward.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eEPDM is not ideal for prolonged contact with petroleum-based oils, so performance can be limited in oil-heavy applications.\u003c\/li\u003e\n\u003cli\u003eThe fixed 70A hardness may not suit applications that require either a much softer or much harder seal.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eEPDM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDurometer\u003c\/td\u003e\n\u003ctd\u003e70A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Dimensions\u003c\/td\u003e\n\u003ctd\u003e2-1\/2 in ID, 2-11\/16 in OD, 3\/32 in CS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eActual Dimensions\u003c\/td\u003e\n\u003ctd\u003e2.487 in ID, 2.693 in OD, 0.103 in CS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMetric Dimensions\u003c\/td\u003e\n\u003ctd\u003e63.17 mm ID, 68.41 mm OD, 2.62 mm CS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e-55C to 125C (-67F to 257F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003ePack of 100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe Mr O-Ring 144 EPDM 70A pack is a practical choice for workshops and maintenance crews who need reliable, weather-resistant seals in volume. Its documented dimensions, broad chemical resistance to polar fluids and long temperature tolerance make it good value for water, steam and outdoor applications; however, shops that work primarily with petroleum oils should select an oil-compatible compound instead.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAre these o-rings suitable for steam service?\u003c\/strong\u003e\u003cbr\u003eYes; the EPDM material is listed as performing in steam up to 204.4C (400F) for many applications, and the specified temperature rating supports hot-service use within limits.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo these match AS568 sizes?\u003c\/strong\u003e\u003cbr\u003eYes; the product meets size standards defined by AS568 and includes both nominal and actual dimensions for confirmation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow long can these be stored before use?\u003c\/strong\u003e\u003cbr\u003eThe manufacturer indicates an unlimited shelf-life, so they can be held as spares without a defined expiry when stored properly.\u003c\/p\u003e","brand":"Mr O-Ring","offers":[{"title":"Default Title","offer_id":48669495558363,"sku":"B07R87DN28","price":36.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/51Kuv29LevL._SL1000_13b229c5-e710-4608-8e08-ba3a7f86cb58.jpg?v=1778703108","url":"https:\/\/gearmusthave.com\/products\/mr-o-ring-144-epdm-o-ring-70a-durometer-2-1-2-in-id-pack-of-100","provider":"GearMustHave","version":"1.0","type":"link"}