What is the difference between Silicone and EPDM rubbers? Factory Suppliers Manufacturers Quotes

What is the difference between Silicone and EPDM rubbers?

What is the difference between Silicone and EPDM rubbers?

Silicone and EPDM are types of rubber that share some truly unique features and uses.Both are regular rubbers and what is the difference between their properties?Which is something to consider when you are choosing between these two rubbers?


EPDM – Ethylene Propylene Diene Monomers is a high density synthetic rubber that is extremely versatile with an ability to withstand high temperatures to 180 Celsius degrees. Because of this versatility it is used in Automotive, Industrial and several other industries. Within those, EPDM is often used for Seals, O-Rings and Grommets because of its resistant properties against weathering, acids and Alkali’s. Some of EPDM’s main properties include:

· Widely temperature rang from -55 to 180 Celsius degrees

· Excellent UV,weathering properties

· Resistant to steam and water

· Less expensive than silicone,with similar properties

Silicone – Silicone is a generally non-reactive, flexible rubber that has interesting properties which make it a widely used material in a number of different industries. Silicone has a high temperature resistance of up to 315c and great flame retardant properties. This makes it ideal for Engineering and Automotive companies. It is also commonly used in the powder coating maskingindustry, where it is generally utilized for its recyclability and effective heat resistance to mask and protect areas while they are coated and baked. Some of Silicone’s key properties include:

· Withstand high & low temperatures from -60c to 300c

· Repels water & forms tight seals

· Unlike EPDM and Neoprene,the compression set of Silicone is consistant over a wide range of temperatures from -60 to 300c

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What’s more important to consider before deciding between the two?

When it comes to choosing between EPDM and Silicone, there are multiple factors you should consider to ensure you’re making the best choice for your desired application. For example, you must consider if the material is going to be used outside, then it must have good weathering properties. However, Silicone doesn’t have good acid and Alkali resistance, meaning that if it rains the rubber would be damaged and would be rendered useless. Other factors you need to take in to consideration are:

· Strength of the material

· Flexibility

· Overall costing

· Resistant properties (chemical, heat, weather, etc.)

· Weight

Once you have considered each of these factors, you can be sure the material meets all your desired criteria and has the properties you require. There really is no ‘better’ choice of materials when it comes to Silicone and EPDM. When it comes to your requirements, both have a place in the market for industry uses. Therefore, it’s essential you make an informed decision based on price, strength, properties and so on.

Beike Sealing is always focusing on high quality rubber seal parts with excellent materials. Special material formula could be developed according to the working situations.

Welcome to contact Beike and find more rubber sealing solutions.No leakage is our everlasting pursuit.




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