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ELASTOSIL® M 4160 A/B US Silicone Rubber is a pourable 1:1, addition-curing, two-component silicone rubber that vulcanizes at room temperature.


  • Good flow
  • Non-shrink cure at room temperature which can be accelerated conderably by the application of heat
  • Hard (Shore A approx. 58)
  • Good Tear Resisstance
  • Excellent resistance to common resins
  • Excellent long-tem stability of mechanical properties


All the information provided is in accordance with the present state of our knowledge. Nonetheless, we disclaim any warranty or liability whatsoever and reserve the right, at any time, to effect technical alterations. The information provided, as well as the product's fitness for an intended application, should be checked by the buyer in preliminary trials. Contractual terms and conditions always take precedence. This disclaimer of warranty and liability also applies particularly in foreign countries with respect to third parties' rights.

Due to the outstanding resistance to casting resins as well as the superior mechanical properties, ELASTOSIL® M 4160 A/B US is especially suitable for all molds of models with extensive undercuts that are to be reproduced in casting resins, especially where a need is to retain a rigid mold.


In addition to the high hardness, which facilitates demolding, ELASTOSIL® M 4160 A/B US has the advantages of a knotty tear, and relatively high specific gravity, making it an advanced molding compound suitable to many applications.


As a hard addition-curing RTV-2 silicone rubber that cures without undergoing dimensional shrinkage, ELASTOSIL® M 4160 A/B US is also extremely suitable for casting all other common reproduction materials, particularly if absolutely accurate copies of models with pronounced undercuts are required.

The platinum catalyst is contained in component A.


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


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


The tables to the right indicate the pot lives and curing
times at various temperatures.


The pot life figures indicate the time required for the
mix to reach a viscosity of 60 000 mPa s.


The curing times apply to a layer thickness of 0.40”.


The "Best use before end date" of each batch is shown on the Certificate of Analysis. Storage beyond the date specified on the Certificate of Analysis 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 49221-9397
United States
+1  888  922-5374 (Phone)
+1 517 264-8246  (Fax)

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