ELASTOSIL® RT 563 is a pourable, room-temperature-vulcanizing, condensation-curing, two-component silicone rubber.


Main application: encapsulation of electronic components


  • Excellent flow
  • High hardness

Specific features of ELASTOSIL® RT 563

  • Condensation-curing
  • Flowable
  • Two-component
  •  Encapsulation of electronic components

ELASTOSIL® RT 563 is cured by adding Catalyst T37 for long pot lives and curing times, or Catalyst T40 for short pot lives and curing times.

The pot life is the period of time at 23 °C / 50 % rel. humidity during which the catalyzed mix to attain a viscosity of 100,000 mPa s and still be just pourable

Catalyst T 37 and T 40 act as solvents until curing is complete. Preliminary tests must therefore be carried out to ensure that they are compatible with the components.

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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