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What is EPDM Rubber?




Before the development of EPDM rubber, seals and weatherstripping were made from natural rubber.  Natural rubber does not have strong weather resistant properties and degraded when exposed to UV for long periods of time.  With the growth of the industry and demand for a UV resistant product, natural rubber could not keep up and meet the complex demands of the industry.

https://rv.steelerubber.com/rv-slide-out-wiper-seal-70-3835-99
EPDM (Ethylene Propylene Diene Monomer) was developed in the 1960s to meet the increasing demand for innovation in manufacturing.  

EPDM essentially mirrors the physical properties of natural rubber and adds the important function of UV resistance.  Since its 20th century birth, EPDM has been a mainstay in the world’s economy.  




While EPDM rubber has excellent weathering and aging resistance, there are a few things you should know about its chemical properties.  While compatible with most substances you will find around your RV, there are a few substances that have the potential of degrading EPDM rubber including:

  • Oils
  •  Kerosene
  • Gasoline
  • Halogenated solvents (chloroform is a commonly known example)


EPDM rubber can be shaped in any way and maintains flexibility for a tight seal.  EPDM rubber seals and weatherstripping are used to reduce noise and provide insulation.  Rubber grommets are used to protect and insulate fuel, water and electrical lines from being chaffed.

Steele Rubber Products uses EPDM for RV parts including door seals, stationary and sliding glass windows, hatches and insert trim and the variety of universal parts that we offer.  Choosing the appropriate type of rubber to use is less about form and more about trusting that your seal is going to last – something that we can stand behind.

For all your RV weatherstripping needs, Steele Rubber Products provides high quality products made from EPDM rubber.  You can find a complete list of all of our door seals, window seals, slide out seals, hatches and insert trim and universal parts on our website rv.steelerubber.com.  Additionally, you can download a free RV Parts catalog online or give us a call to request a mail catalog 800-230-6752. 

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