{"product_id":"ethylene-acrylic-rubber-aem","title":"Ethylene Acrylic Rubber (AEM)","description":"\u003ch2\u003eAEM (Ethylene Acrylic Rubber): Superior Heat \u0026amp; Oil Resistance Elastomer\u003c\/h2\u003e\n\u003cp\u003eEthylene Acrylic Rubber (AEM), commonly known by the trade name VAMAC®, is a premium synthetic elastomer engineered for exceptional resistance to hot oils, oxidation, and extreme temperatures. Designed specifically for automotive underhood and powertrain applications, AEM delivers reliable sealing performance in the harshest thermal and chemical environments where standard elastomers rapidly degrade.\u003c\/p\u003e\n\u003ch3\u003eKey Properties of AEM Rubber\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eExceptional Hot Oil Resistance:\u003c\/strong\u003e Superior resistance to hot engine oils, ATF, gear oils, and biodiesel at extreme temperatures\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtreme Temperature Performance:\u003c\/strong\u003e Continuous operation from -40°F to 375°F (-40°C to 190°C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutstanding Heat Aging:\u003c\/strong\u003e Excellent long-term stability in high-temperature oxidative environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow Compression Set:\u003c\/strong\u003e Minimal permanent deformation at elevated temperatures—maintains sealing integrity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBiodiesel Compatibility:\u003c\/strong\u003e Excellent resistance to biodiesel fuels (B20, B100) and biofuels\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow-Temperature Flexibility:\u003c\/strong\u003e Maintains flexibility to -40°F—superior to ACM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOzone \u0026amp; Weather Resistance:\u003c\/strong\u003e Excellent outdoor durability and UV resistance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCommon Applications \u0026amp; Uses\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomotive Underhood:\u003c\/strong\u003e Turbocharger hoses, either as a liner for silicone rubber or hoses entirely from AEM typically with NOMEX reinforcement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePowertrain:\u003c\/strong\u003e Crankshaft seals, camshaft seals, transmission seals, differential seals\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Components:\u003c\/strong\u003e Oil pan gaskets, oil pump seals, PCV system components\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuel Systems:\u003c\/strong\u003e Biodiesel-compatible fuel hoses, seals, and O-rings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEmission Control:\u003c\/strong\u003e EGR system seals, turbocharger gaskets, exhaust system components\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy-Duty Vehicles:\u003c\/strong\u003e Truck and off-highway equipment seals for extreme-duty applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial:\u003c\/strong\u003e High-temperature hydraulic seals, hot oil applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAdvantages of AEM\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eIndustry-leading hot oil resistance—outperforms NBR and ACM at temperatures above 300°F\u003c\/li\u003e\n\u003cli\u003eExceptional heat aging and oxidation resistance for extended service life\u003c\/li\u003e\n\u003cli\u003eSuperior low-temperature flexibility (-40°F) compared to ACM (-15°F)\u003c\/li\u003e\n\u003cli\u003eExcellent biodiesel and biofuel compatibility—critical for modern fuel systems\u003c\/li\u003e\n\u003cli\u003eExtremely low compression set at elevated temperatures maintains long-term sealing\u003c\/li\u003e\n\u003cli\u003eOutstanding ozone and weather resistance for underhood exposure\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide temperature range:\u003c\/strong\u003e -40°F to 375°F covers most automotive operating conditions\u003c\/li\u003e\n\u003cli\u003eGood resistance to coolants, glycols, and water-based fluids\u003c\/li\u003e\n\u003cli\u003eCost-effective alternative to fluoroelastomers (FKM) for hot oil applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eLimitations \u0026amp; Disadvantages\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLimited Fuel Resistance:\u003c\/strong\u003e Not suitable for gasoline or aromatic fuels—FKM or fluorosilicone preferred\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePolar Solvent Sensitivity:\u003c\/strong\u003e Poor resistance to ketones, esters, and chlorinated solvents\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigher Cost:\u003c\/strong\u003e More expensive than NBR and ACM, though less costly than FKM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProcessing Requirements:\u003c\/strong\u003e Requires specialized curing systems and post-cure for optimal properties\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAcid Resistance:\u003c\/strong\u003e Limited resistance to strong acids compared to FKM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailability:\u003c\/strong\u003e Less widely available than NBR or neoprene—specialty material\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAEM vs. Other Rubber Materials\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eAEM vs. ACM (Acrylic):\u003c\/strong\u003e AEM offers superior low-temperature flexibility (-40°F vs. -15°F), higher maximum temperature (375°F vs. 350°F), and better biodiesel resistance. ACM is more cost-effective for moderate-temperature transmission applications. AEM is the choice for extreme underhood environments; ACM for transmission seals.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAEM vs. NBR (Nitrile):\u003c\/strong\u003e AEM significantly outperforms NBR in hot oil resistance and heat aging above 250°F, while NBR provides better fuel resistance and lower cost. Use AEM for extreme-temperature underhood seals; NBR for standard-temperature petroleum applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAEM vs. FKM (Viton):\u003c\/strong\u003e FKM offers broader chemical resistance and higher maximum temperature (400°F), but AEM is more cost-effective with better low-temperature flexibility for dedicated hot oil applications. AEM is the choice for biodiesel-compatible underhood seals; FKM for multi-chemical, extreme-temperature environments.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAEM vs. HNBR (Hydrogenated Nitrile):\u003c\/strong\u003e Both offer good hot oil resistance and low-temperature flexibility, but AEM provides superior heat aging and biodiesel compatibility. HNBR offers better fuel resistance. AEM is preferred for biodiesel and extreme heat; HNBR for broader fuel compatibility.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAEM vs. Silicone:\u003c\/strong\u003e Silicone offers wider temperature range (-65°F to 450°F) but poor oil resistance. AEM provides superior hot oil resistance with excellent high-temperature performance. AEM is the choice for hot oil sealing; silicone for extreme temperatures without oil contact.\u003c\/p\u003e\n\u003ch3\u003eAEM Grades \u0026amp; Formulations\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard AEM:\u003c\/strong\u003e General-purpose grade for underhood and powertrain seals—most common type\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-temperature AEM:\u003c\/strong\u003e Enhanced formulations for continuous service to 375°F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow-temperature AEM:\u003c\/strong\u003e Optimized for improved cold flexibility while maintaining heat resistance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBiodiesel-resistant AEM:\u003c\/strong\u003e Specially compounded for B20 and B100 biodiesel compatibility\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCuring \u0026amp; Processing Considerations\u003c\/h3\u003e\n\u003cp\u003eAEM requires specialized curing systems (typically peroxide or soap cures) and benefits significantly from post-cure heat treatment to achieve optimal hot oil resistance, compression set properties, and heat aging performance. Proper post-cure is critical for long-term reliability in extreme-temperature applications.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardness Range:\u003c\/strong\u003e 60–90 Shore A (customizable by formulation)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecific Gravity:\u003c\/strong\u003e 1.05–1.12\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTensile Strength:\u003c\/strong\u003e 1,200–2,200 psi (varies by grade)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElongation at Break:\u003c\/strong\u003e 200–500% (varies by formulation)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompression Set:\u003c\/strong\u003e Excellent at elevated temperatures (typically \u0026lt;20% at 175°C\/347°F for 70 hours)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e -40°F to 375°F continuous (-40°C to 190°C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVolume Swell:\u003c\/strong\u003e Low swell in hot engine oils and biodiesel\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Choose AEM from Rubber Mexico?\u003c\/h3\u003e\n\u003cp\u003eOur AEM compounds are formulated for maximum hot oil resistance, heat aging stability, biodiesel compatibility, and compression set performance across automotive underhood, powertrain, and heavy-duty applications. With in-house molding, precision machining, and custom compounding capabilities, we deliver mission-critical AEM seals and gaskets engineered to your exact specifications and extreme operating conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNeed a custom AEM solution?\u003c\/strong\u003e Contact us for material selection guidance, grade optimization, biodiesel compatibility testing, post-cure development, compound validation, prototyping, and production support for your most demanding underhood sealing challenges.\u003c\/p\u003e","brand":"Rubber Mexico","offers":[{"title":"Default Title","offer_id":51662860091671,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0716\/9395\/9447\/files\/image_60.png?v=1741713214","url":"https:\/\/rubber-mexico.com\/products\/ethylene-acrylic-rubber-aem","provider":"Rubber Mexico","version":"1.0","type":"link"}