Ethylene propylene diene monomer (EPDM) sealing rings, with their outstanding heat resistance, ozone resistance, anti-aging ability, and stable performance in water and steam environments, have become regulars in scenarios such as valves, pump bodies, hot water circulation systems, and outdoor equipment. They are also regarded as "durable players" by engineers. However, many people have encountered such a frustrating situation: the originally stable EPDM sealing ring stops working as soon as it comes into contact with lubricating oil - either it expands, softens, becomes sticky and deforms, or its size deviates. In mild cases, it causes oil leakage and dripping from the equipment; in severe cases, it directly fails the seal, leading to equipment shutdown for maintenance. This not only delays production progress but also increases hidden costs. In fact, the core reason is quite simple: EPDM sealing rings are inherently "afraid" of mineral oil-like media! ​

The mineral oil and petroleum solvents contained in ordinary lubricating oil can be regarded as the "natural enemies" of EPDM material. This type of oil can damage the molecular structure of the sealing ring, causing it to lose elasticity and swell, just like high-quality rubber being "corroded". Even if the sealing ring is replaced frequently, it can only address the symptoms but not the root cause.

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To ensure the long-term stable operation of EPDM sealing rings, mineral oil must be avoided when selecting oil, and the principle of "synthetic type, low swelling" should be adhered to:

Give priority to using PAO synthetic oil, silicone oil, or synthetic grease specially adapted for EPDM material. These types of oil will not cause the sealing ring to swell and have full compatibility. (Recommended: Baoxing BX-602 series waterproof sealing grease, Baoxing BX-455 series food-grade sealing grease)

Firmly avoid ordinary mineral oil and lubricating oil containing petroleum-based components to prevent seal failure due to material incompatibility. ​

If the equipment involves special working conditions such as high temperature, high water vapor, and long-term operation, precise selection should be made in combination with the details of the working conditions - factors such as temperature, medium, and energy-saving requirements will all affect the oil adaptation effect. ​

Baoxing has been deeply engaged in the field of sealing material and oil compatibility for 20 years, specializing in the research and development, production and sales of lubricating oils. It has accumulated rich experience in dedicated lubrication solutions for EPDM sealing rings and customized cases, and can provide tailor-made lubrication solutions for the manufacturing industry. We can precisely recommend non-swelling, non-corrosive and long-lasting stable lubricating grease based on the working conditions of your equipment, and provide core services such as technical selection, sample application and formula customization to help you avoid the production risk of "choosing the wrong oil". With export qualifications, Baoxing supports foreign trade exports. We sincerely invite partners to share the advantage of direct supply from the source manufacturer. We will provide one-stop services including technical training, market promotion and after-sales guarantee to achieve win-win results. Welcome to consult!