CX-31-40 Addition Cured Mold Making Silicone Rubber

  • High tensile strength and tear strength
  • Excellent heat resistance;low shrinkage
  • It is widely used for casting wax, gypsum, resins, concrete and other materials


CX-31-40 is a two-part platinum-catalyzed silicone rubber with mixing ratio of 1:1 by volume. It offers good fluidity, low shrinkage and high tear-strength. It is easily mixed and poured, cured at room temperature and high temperature. It is suitable for casting polyester, epoxy, wax and a wide range of other casting materials.


  • Excellentfluidity
  • Lowshrinkage
  • Superb heatresistance
  • High tensile strength and tear strength
  • Eco-friendly


  • Easy to use: is easily mixed and poured.
  • Low shrinkage: shrinkage is less than 0.1%, and give accurate reproduction of mold making masters.
  • Excellent heat resistance : work in a wide range of service temperature from -55℃ to250℃.
  • Adjustable cure times andpot life: The pot life and cure times can be adjusted by plat-cat cure accelerator.
Appearance   Clear to slightly hazy liquid
Viscosity cP



Specific gravity g/cm³ 1.15
Mixing ratio % A:B=1:1
Shrinkage  % <0.1
Hardness(Shore A)   40
Port Life(25°C) mins 40
Cure Time(25℃) hours 2-3
Tensile Strength Kgf/cm² 80
Tear Strength Kgf/cm² 18
Elongation % 400
Mixed Viscosity cP 8,000-9,000


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