$ELASTOSIL<sup>®</sup> RT 620 A/B

Pourable, addition-curing, two-component silicone rubber that vulcanizes at room temperature.


Main application: Making printing pads, food contact (FDA/ BfR compliant).


  • Very good flow
  • High reactivity for fast demolding even if large amounts of silicone fluid are added
  • Fast and non-shrink cure at room temperature which can be accelerated considerably by the application of heat
  • Very low hardness (Shore A approx. 17)
  • High tear strength
  • Translucent when cured, any color possible by adding a Wacker Pigment Paste FL

Specific features of ELASTOSIL® RT 620 A/B

  • Addition Curing
  • BfR compliant
  • FDA compliant
  • Flowable
  • Food-contact
  • Low viscosity
  • Two-component

Base rubber for making printing pads.

Important note:
The platinum catalyst is in component B.

A and B components may only be used together if they have the same batch number.

To ensure optimum flow of the material, the components must be stirred thoroughly before they are removed or processed in their containers.

Dilution charts:
The following table shows the hardness of ELASTOSIL® RT 620 A/B as a function of the added amount of Wacker Silicone Fluid AK 35 for Durometer Types Shore A and Shore 00.


Please check also our brochures and info sheets.



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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