IsoMold UMR 611

IsoMold UMR 611 is a two-part polyurethane molding system. IsoMold UMR 611 is mixed one-to-one by volume (or 1.04-to-1.00 by weight) and cures at room temperature. IsoMold UMR 611 contains no fillers and cures to a firm (Shore A61 ± 2); medium amber rubber. IsoMold UMR 611 is used to make molds of detailed masters that contain shallow undercuts. Because IsoMold UMR 611 is clear; it is ideal for projects that require the master to be visible during molding and cutting. Some of the most common uses of IsoMold UMR 611 are concrete formliners and to make molds for point-of-purchase displays; rapid prototypes; special effects; taxidermy; and sculpture reproductions.


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Technical Data Sheet


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


  • Convenient mixing ratio (s)
  • Mercury Free
Product Types



Product Testing

Test PerformedTest Results
Color - ISOClear  
Color - POLLight Amber  
Cure Time24 Hours 
Demold Time24 Hours 
Elongation - ASTM D412610 % 
Full Cure3-5 Days 
Hardness - ASTM D2240 - Shore A59-63 Shore A 
Mix Time - by Hand1-2 Minutes 
Pot Life - 100g20 Minutes 
Ratio by Volume - ISO:POL1:1  
Ratio by Weight - ISO:POL1.04:1.00  
Rebound, Bayshore % - ASTM D263238 % 
Shrinkage0.005 in/in 
Tear Strength - ASTM D624, Die C176 pli 
Tensile Modulus - ASTM D412900 psi 
Tensile Modulus - ASTM D412 - 100%410 psi 
Tensile Modulus - ASTM D412 - 200%540 psi 
Tensile Modulus - ASTM D412 - 300%650 psi 
Tensile Strength - ASTM D4121020 psi 
Trouser Tear - ASTM D624, Die T41 pli