Isocast RCR 732

IsoCast RCR 732 (Formerly PAK Mark 2) is used to make castings from rigid and flexible molds. Some of the most common uses of IsoCast RCR 732 are point-of-purchase displays, rapid prototypes, special effects, and sculpture reproductions. However, IsoCast RCR 732 can be used for any application that requires a lightweight, hard plastic. IsoCast RCR 732 is a two-part polyurethane casting system. IsoCast RCR 732 is mixed one-to-one by volume and cures at room temperature. IsoCast RCR 732 begins to gel in 2-2.5 minutes, and cures to a white color.



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


  • Convenient mixing ratio (s)
Product Types

Casting Resin


Product Testing

Test PerformedTest Results
Color - ISOOpaque Yellow  
Color - POLTranslucent Yellow  
Color of PartWhite  
Compressive Strength - ASTM D6954300 psi 
Demold Time8-15 Minutes 
Elongation - ASTM D41210 % 
Hardness - ASTM D2240 - Shore D71-75 Shore D 
Izod Impact Notched - ASTM 256A.26 
Izod Impact Unnotched - ASTM 256E6.1 
Izod Impact-Notched, Four Specimens - ASTM D256-93A.29 
Linear Shrinkage - ASTM D2566.0098 % 
Mix Time - by Hand30 Seconds 
Modulus of Elasticity - ASTM D790874 psi 
Pot Life - 100g1.5 Minutes 
Ratio by Volume - ISO:POL1:1  
Ratio by Weight - ISO:POL1:1.12  
Rebound, Bayshore % - ASTM D263230 % 
Stress - ASTM D790 - at 5% Strain33.3 psi 
Tensile Strength - ASTM D4124700 psi 

Posted on

May 18, 2020