ELASTOSIL® SC 870 A/B is a thixotropic, addition-curing, two-part silicone rubber, forming a mainly closed cell foam.

ELASTOSIL® SC 870 A/B is perfectly suited for processing with automatic dispensing equipment. It is suitable for CIPG foam gaskets even in 3D geometries due to its outstanding rheology.



  • good processability on automated dispensing equipment
  • easy control of mixing quality due to different colors of the components
  • no ozone damaging blowing agents
  • no release of toxic or strong smelling substances during foaming or curing
  • low heat of reaction (max. 40 °C)
  • low toxicity of thermal decomposition products 
  • long-term flexible over a temperature range of -50 °C to +180 °C
  • good chemical resistance
  • fast foaming and cure
  • medium foam density

Specific features of ELASTOSIL® SC 870 A/B

  • Compressible
  • Foam
  • Heat resistant
  • Thixotropic
  • Two-component
  • general purpose foam for gaskets (dispensed foam gaskets)
  • especially suitable for 3-dimensional gasket bead
  • general purpose high and low temperature resistant sealing material
  • suitable for NVH insulation


The 'Best use before end' date of each batch is shown on the product label.

Storage beyond the date specified on the label does not necessarily mean that the product is no longer usable. In this case however, the properties required for the intended use must be checked for quality assurance reasons.

Sales and support

Wacker Chemical Corporation
3301 Sutton Road
Adrian, MI 49221-9397
United States
+1  888  922-5374 (Phone)

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