EPDM: How to Compare Peroxide-Cured and Sulfur-Cured?

EPDM: How to Compare Peroxide-Cured and Sulfur-Cured?

EPDM O-rings are known for their excellent environmental resistance and extended shelf life. They belong to the family of synthetic elastomers and offer cost-effective steam and chemical resistance, making them ideal for applications involving solvents, acids, and mild chemicals. The choice of rehabilitating EPDM materials depends on the specific end-use application, and factors like chemical, heat, and tensile resistance should be considered when selecting between peroxide-cured and sulfur-cured options.

To elucidate the differences between peroxide-cured and sulfur-cured EPDM, we have outlined some key characteristics of each type to assist you in making the best match for your application:

Characteristics of Peroxide-Cured EPDM:

  1. Superior resistance to higher temperatures, up to 257ºF.
  2. Higher tensile strength.
  3. Lower compression set.
  4. Enhanced tear strength.
  5. Aging resistance.
  6. Compatibility with a wider range of fillers.
  7. Improved resistance to chemicals and oils.
  8. Does not stain PVC or metals.

It is worth noting that peroxide-cured EPDM O-rings offer an expanded range of conditions they can withstand, including alcohols, brake fluids, ketones, hot water, and steam (up to 400ºF).