IsoMold CMR 4002

IsoMold CMR 4002  is a two-part polyurethane molding system. IsoMold CMR 4002 is mixed one-to-one by volume and cures at room temperature. IsoMold CMR 4002 cures to a medium (Shore A 40 ± 2), gray rubber. IsoMold CMR 4002 is used to make molds of detailed masters that do not contain undercuts. IsoMold CMR 4002 physical properties make it ideal for making concrete patterns and formliners.


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Technical Data Sheet


  • Pigmented and Unpigmented Concrete Moldings
  • Point of Purchase Displays
  • Precast Concrete Moldings
  • Sculpture Repoductions


  • Convenient mixing ratio (s)
  • Excellent release characteristics
  • Low shrinkage
  • Picks up fine detail in molding/casting applications
Product Types

Concrete Mold Rubber


Product Testing

Test PerformedTest Results
Color - ISOAmber  
Color - POLCream  
Demold Time16-24 Hours 
Elongation - ASTM D412745 % 
Full Cure7 Days 
Hardness - ASTM D2240 - Shore A38-42 Shore A 
Initial Cure Time24-48 Hours 
Mix Time - by Hand1-2 Minutes 
Ratio by Volume - ISO:POL0.96:1  
Ratio by Weight - ISO:POL1:1  
Tear Strength - ASTM D624, Die C92 pli 
Tensile Modulus - ASTM D412118 psi 
Tensile Modulus - ASTM D412 - 100%113 psi 
Tensile Modulus - ASTM D412 - 200%186 psi 
Tensile Modulus - ASTM D412 - 300%245 psi 
Tensile Strength - ASTM D412555 psi 
Weight per gallon - ISO8.25-8.75  
Weight per gallon - POL8.25-8.75