Silicone 70 Specifications

SILICONE 70 DUROMETER

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Welcome to our Silicone Specifications Section

Here you will find our Silicone specifications chart which can also be downloaded in PDF. The Silicone properties that are listed below are for our most popular Silicone 70 durometer (70A) rubber material. If you need properties that are different than the ones in the chart below, please take a look at our other popular rubber material specifications otherwise we can compound and reformulate the Silicone rubber specifications to suit your needs. Finding the correct material especially if you are using it for an O-ring seal is important as the seal can degrade easily if the material is not compatible.

Mykin Inc’s RS00170 Silicone compound offers a broad temperature range, from -80º F to +400º F, and excellent dry heat resistance. Silicone has the best low temperature flexibility of all elastomers and can be used in static applications down to -150F. Silicones also has good resistance to ozone and weather. It also proves to be a good insulator. It is not recommended for dynamic conditions due to its low tensile and tear strength.


ASTM DesignationORIGINAL PROPERTIESASTM D2000 SPECIFICATION
  Durometer, Shore A 70 +/- 5
  Tensile, psi (MPa), Minimum 870 (6)
  Elongation, % Minimum 150
  Specific Gravity -
     
A19 HEAT AGE, 70 HRS @ 225 C  
  Durometer Change, Points +10
  Tensile Strength Change, % -25
  Elongation Change, % Maximum -30
     
B37 COMPRESSION SET, 22 HRS @ 175 C  
  Original Deflection, % Maximum 25
     
EO16 ASTM #1 OIL, 70 HRS @ 150 C  
  Durometer Change, Points 0/-15
  Tensile Change, % Maximum -20
  Elongation Change, % Maximum -20
  Volume Change, % 0/+10
     
EO36 ASTM #3 OIL, 70 HRS. @ 150 C  
  Durometer Change, points -30
  Volume Change, % Maximum +60
     
EA14 WATER RESISTANCE 70 HRS @ 100 C  
  Durometer Change, Points +/-5
  Volume Change, % +/-5
     
F19 LOW TEMPERATURE BRITTLENESS  
  ASTM D2137, Method A  
  3 Minutes @ -55 C Non-Brittle
     
G11 Tear Resistance, Die B, ppi (kN/m) 51(9)

SPECIFICATIONS MET

  • ASTM D2000-01 Grade M5GE706 A19 B37 EO16 EO36 EA14 F19 G11
  • ZZ-R-765B Class 2a & 2b, Grade 70 and FDA CFR 177.2600
  • AMS 3304 (Size per AS3582 which replaced MS 9068) Specification