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Elastosil M 4643 US                                                 



Elastosil M 4643 US A/B is a 48 duro RTV-2 silicone rubber.  It's a pourable, addition-curing, very high strength silicone that can be vulcanized at room temperature, or at elevated temperatures to increase the rate of cure.


  •  cures to nominal 48 duro Shore A hardness
  •  very good flow
  •  non-shrink cure at room temperature
  •  cure can be accelerated by the application of heat
  •  excellent long-term stability of cured product's mechanical properties

Basic Typical Physical Properties

RubberWorks RTV Data Sheet

Elastosil M 4643 US A/B

Property Test Procedure Component A   Component B
Appearance   White   Dark Grey
Density, 23 C, g/cm3 DIN 52 479 A 1.30   1.00
Viscosity, 23 C, cPs Brookfield 60,000   700
      Mixed 9:1 Ratio  
Hardness, Shore A DIN 53 505   48  
Tensile Strength, psi DIN 53 504 S3   865  
Elongation at Break, % DIN 53 504 S3   300  
Tear Resistance, ppi ASTM D624, B   > 60  
Linear Shrinkage, %     < 0.1  
Viscosity, 23 C, cPs Brookfield   25,000  
Appearance     Grey  
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 4643 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.