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liquid silicone rubbers lifesciences generalhealthcare

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Injection Molding Elastomer, Resists Blocking


  • Two-part, white silicone system used with injection molding equipment
  • Cures with heat via addition-cure chemistry 
  • Designed to resist blocking on molded parts caused by radiation sterilization
  • 1:1 Mix Ratio (Part A: Part B)


  • For the injection molding of parts requiring a material with a medium durometer including: molded rubber stoppers, gaskets, seals, valves, o-rings and other precision parts
  • Suitable for over-molding applications
  • Can be used with NuSil’s Healthcare color masterbatches for applications requiring colored silicones

NuSil MED-4942 shall not be considered for use in human implantation for a period of greater than 29 days.

Product Details

Property Average result
Durometer 40 Type A
Tensile 850 psi
Elongation 350 %
Tear 130 ppi
Appearance White
Cure 10 minutes / 150 °C
Cure System Platinum
Mix Ratio 1:1
Specific Gravity 1.17
Work Time >72 hours
Comment Injection Molding Elastomer, Resists Blocking
Display in metric units

The above properties are tested on a lot-to-lot basis. Do not use as a basis for preparing specifications. Please contact NuSil Technology for assistance and recommendations in establishing particular specifications.

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