EPDM 70 Specifications

EPDM 70 DUROMETER

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Welcome to our EPDM Specifications Section

Here you will find our Ethylene Propylene rubber (EPDM) specifications chart which can also be downloaded in PDF. The EPDM properties that are listed below are for our most popular EPDM 70 durometer (70A) rubber material. If you need EPDM properties that are different than the ones shown in the chart below, we can reformulate the compound of the EPDM material so that the EPDM rubber specifications suit your needs. Finding the correct material especially if you are using it for an O-ring seal is important as the rubber can degrade quickly if the material is not compatible with your environment.

Mykin Inc’s sulfur-cured RE00170 EPDM compound has a temperature use range of -65°F to +300°F. Sulfur-cured EPDM is the least costly and provides better tear and abrasion resistance compared to peroxide-cured compounds. EPDM compounds are frequently used with foods, water, steam and phosphate ester fluids (Skydrol) applications and offer the excellent resistance to brake fluids (glycol base), weather, and ozone. EPDM’s are not used with petroleum oils or fuels because significant swelling would result.


ASTM DesignationORIGINAL PROPERTIESASTM D2000 SPECIFICATION
  Durometer, Shore A 70 +/- 5
  Tensile, psi (MPa), Minimum 2031 (14)
  Elongation, % Minimum 200
  Specific Gravity -
     
A25 HEAT AGE, 70 HRS @ 125 C  
  Durometer Change, Points +10
  Tensile Strength Change, % Maximum -20
  Elongation Change, % Maximum -40
     
B35 COMPRESSION SET, 22 HRS @ 125 C  
  Original Deflection, % Maximum 50
     
C32 RESISTANCE TO OZONE  
  ASTM D1171, Method B Pass
     
EA14 WATER RESISTANCE , 70 HRS @ 100 C  
  Volume Change, % +/-5
     
F17 LOW TEMPERATURE BRITTLENESS  
  ASTM D2137, Method A, 9.3.2  
  3 Minutes @ -40 C Non-Brittle
     
G21 TEAR RESISTANCE  
  Method D 624, Die C, Minimum kN/m 26

SPECIFICATIONS MET

  • ASTM D2000-01 Grade M5CA714 A25 B35 C32 EA14 F17 G21
  • ASTM D2000-75 Grade5CA720 A25 B35 C32 L14 F17 G21
  • FDA CFR 177.2600