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.



  • Point of Purchase Displays
  • Rapid Prototypes
  • Sculpture Reproductions
  • Special Effects
  • Taxidermy


  • Convenient mixing ratio (s)
  • Mercury Free
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 
Deflection Temperature Under Load - ASTM D648136 °F 
Demold Time15-20 Minutes 
Elongation - ASTM D4128 % 
Flash Point - ASTM D92 - POL300 °F 
Flash Point - ASTM D93 - ISO340 °F 
Flexural Strength - ASTM D79043942 psi 
Gel Time - 100 gram sample, 74°F2.5 Minutes 
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 - 74°F, ISO1.09-1.13  
Specific Gravity - 74°F, POL.97-1.05  
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 
Viscosity - ASTM D-2196 - 74°F, ISO40-70 cps 
Viscosity - ASTM D-2196 - 74°F, POL80-100 cps 

Posted on

December 18, 2020