Room temperature vulcanizing, addition-curing, two component silicone rubber (to be processed via brushing, spraying, casting).


System for the production of reusable silicone vacuum bags.


  • low viscosity
  • shear thinning
  • good mechanical properties
  • rapid curing
  • easily remoldable

Specific features of ELASTOSIL® C 1200 A/B

  • Addition Curing
  • Fast curing at room temperature
  • Flowable
  • No chemical shrinkage
  • Resistance against epoxy resins
  • Resistance against polyester
  • Two-component

ELASTOSIL® C 1200 A/B has been especially developed for the professional production of reusable vacuum bags, used for the production of composite parts. Due to its shear thinning behavior it will be self leveling, yet not running off vertical surfaces.

It's medium term pot-life will allow the use on larger surfaces, still enabling a quick curing of the bag.

ELASTOSIL® C 1200 A/B may be processed using a manual or pneumatic gun. It is supplied in a double cartridge and will be applied directly onto the tool.

For larger amounts it may also be processed using a 2-component mixing and metering machine.

On larger surfaces it may also be sprayed using compressed air.

We recommend to post-curing the vacuum bag for 2-3 hours at operating temperature, 220 °C max.

Important note:
The platinum catalyst is in component A.

Only components A and B with the same lot number may be processed together!


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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