Home Addition Cure Silicone Putty Condensation Cure

Elastosil M 4542 US                                                 



Elastosil M 4542 US is a 40 duro RTV-2 silicone rubber.  This condensation-curing high strength silicone vulcanizes at room temperature to a low hardness.


  •  cures to nominal 40 duro Shore A hardness
  •  very good flow and self-deaeration
  •  high elongation and elasticity - good tear strength

Basic Typical Physical Properties

RubberWorks RTV Data Sheet

Elastosil M 4542 US

Property Test Procedure Value
Appearance   White
Density, 23 C, g/cm3 DIN 52 479 A 1.28
Viscosity, 23 C, mPas Brookfield 34,000
Catalyzed and Cured with 10 wt% Catalyst T121 US
Hardness, Shore A DIN 53 505 40
Tensile Strength, psi DIN 53 504 S3 1000
Elongation at Break, % DIN 53 504 S3 280
Tear Resistance, ppi ASTM D624, B 100
Linear Shrinkage, %   0.4
Viscosity, 23 C, mPas Brookfield 34,000

Typical Values shown are not intended for use in the preparation of specifications

Elastosil M 4542 US is available in 18 kg Pails and is supplied with a suitable Wacker Catalyst

            Call RubberWorks for the detailed Wacker Elastosil Data Sheet


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Last modified: December 28, 2010

Elastosil, Semicosil, and Powersil are registered trademarks of Wacker Chemical.