IsoMold UMR 711

IsoMold UMR 711 is a two-part polyurethane molding system. IsoMold UMR 711 is mixed one-to-one by volume and cures at room temperature to a hard (shore A70±4); dark amber rubber. IsoMold UMR 711 is used to make molds of detailed masters that do not contain undercuts. Some of the most common uses of IsoMold UMR 711 are diaphragms; dust boots; gaskets; liners; flexible molds; foundry patterns; wear pads; and concrete stamp pads.


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Technical Data Sheet


  • Concrete Stamp Pads
  • Diaphragms
  • Dust Boots
  • Flexible Molds
  • Foundry Patterns
  • Gaskets
  • Liners
  • Wear Pads


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



Product Testing

Test PerformedTest Results
Color - ISOLight Amber  
Color - POLOpaque Red  
Compound Specific Gravity1.06  
Cure Time5 Days 
Demold Time24 Hours 
Elongation - ASTM D412400 % 
Hardness - ASTM D2240 - Shore A66-74 Shore A 
Mix Time - by Hand1-3 Minutes 
Pot Life - 100g12 Minutes 
Ratio by Volume - ISO:POL1:1  
Ratio by Weight - ISO:POL104:100  
Rebound, Bayshore % - ASTM D263256 % 
Shrinkage0.004 in/in 
Split Tear - ASTM D47030 pli 
Tear Strength - ASTM D624, Die C260 pli 
Tensile Modulus - ASTM D412 - 100%402 psi 
Tensile Modulus - ASTM D412 - 200%528 psi 
Tensile Modulus - ASTM D412 - 300%716 psi