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Elastosil M 4641 US                                                 



Elastosil M 4641 US A/B is a 43 duro RTV-2 silicone rubber.  It's a pourable, addition-curing high strength silicone that can be vulcanized at room temperature, or at elevated temperatures to increase the rate of cure.


  •  cures to nominal 43 duro Shore A hardness
  •  very good flow properties
  •  high tear strength
  •  good transparency for visual control

Basic Typical Physical Properties

RubberWorks RTV Data Sheet

Elastosil M 4641 US A/B

Property Test Procedure Component A   Component B
Appearance   Transparent   Colourless
Density, 23 C, g/cm3 DIN 52 479 A 1.08   0.97
Viscosity, 23 C, mPas Brookfield 50,000   400
      Mixed 10:1 Ratio  
Hardness, Shore A DIN 53 505   43  
Tensile Strength, psi DIN 53 504 S3   > 650  
Elongation at Break, % DIN 53 504 S3   > 300  
Tear Resistance, ppi ASTM D624, B   > 140  
Linear Shrinkage, %     < 0.1  
Viscosity, 23 C, mPas Brookfield   30,000  
Appearance     Transparent  
Typical Values Shown are not intended for use in the preparation of specifications

Contact RubberWorks for a complete Wacker Data Sheet describing this Elastosil product

M 4641 US is supplied in kits consisting of A and B Components

            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.