IsoCast RCR 703

IsoCast RCR 703 is a two-part polyurethane rigid casting system. It is mixed one-to-one by volume and cures at room temperature. IsoCast RCR 703 begins to gel in approximately 2 minutes and cures to a creamy white color. IsoCast RCR 703 is used to make castings from rigid and flexible molds. Some of the most common uses of IsoCast RCR 703 are point-of-purchase displays; rapid prototypes; special effects; taxidermy; and sculpture reproductions. However; IsoCast RCR 703 can be used for any application that requires lightweight; hard plastic.



  • Concrete Crack Fill
  • Concrete Joint Fill
  • Concrete Patch
  • Point of Purchase Displays
  • Rapid Prototypes
  • Sculpture Reproductions
  • Special Effects
  • Taxidermy


  • Convenient mixing ratio (s)
  • Mercury Free
  • Rapid cure time
Product Types

Casting Resin


Product Testing

Test PerformedTest Results
Color - ISObrown  
Color - POLclear  
Compressive Strength - ASTM D69513,166  
Compressive Yield Strength - ASTM D6955133 psi 
Cure Time24 Hours 
Demold Time15-20 Minutes 
Elongation - ASTM D4128 % 
Flexural Strength - ASTM D79043942 psi 
Hardness - ASTM D2240 - Shore D68-72 Shore D 
Izod Impact Notched - ASTM 256A1.21 
Mix Time - by Hand1 Minute 
Modulus of Elasticity - ASTM D790193410 psi 
Modulus of Elasticity Under Compression - ASTM D695159210 psi 
Pot Life - 100g60-75 Seconds 
Ratio by Volume - ISO:POL1:1  
Ratio by Weight - ISO:POL0.885:1  
Rebound, Bayshore % - ASTM D263250 % 
Specific Gravity - ASTM D7921.05  
Stress - ASTM D790 - at 5% Strain7207 psi 
Stress - ASTM D790 - at Given Strain, 1.5 of sample thickness6279 psi 
Stress - ASTM D790 - at Maximum Strain7337 psi 
Tensile Strength - ASTM D6386000 psi