EPDM O-rings can withstand a temperature range of -55°C to 150°C.
EPDM (Ethylene-Propylene-Diene Monomer) is a copolymer of ethylene, propylene, and a small amount of non-conjugated diene monomers, whose main chain is composed of chemically stable saturated hydrocarbons only, with unsaturated double bonds in the side chains, thus having excellent aging resistance to ozone, heat, and weathering. This rubber has extensive applications in automotive parts, building waterproof materials, electrical wire and cable sheaths, heat-resistant rubber hoses, tapes, and automotive seals. EPDM rubber seals have excellent weather resistance, ozone resistance, water resistance, and chemical resistance, especially suitable for alcohols and ketones, and can also be used for sealing in high-temperature water vapor environments. Its general use temperature range is -40°C to 150°C, but the temperature range can vary from -55°C to 150°C depending on different source information. Additionally, EPDM rubber begins to slowly decompose at high temperatures, but adding anti-aging agents can improve its high-temperature performance, increase the use temperature, and extend its service life at high temperatures. Therefore, EPDM O-rings can maintain stable performance over a wide temperature range, meeting the needs of various application scenarios.