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liquid silicone rubbers lifesciences medicalimplant





Injection Molding Elastomer, Resists Blocking


  • Two-part, white silicone system designed for use with injection molding equipment
  • Cures with heat via addition-cure chemistry
  • 1:1 Mix Ratio (Part A: Part B)
  • High tear strength
  • Designed to resist blocking and rehealing that otherwise might be induced by the radiation sterilization of molded parts.


  • 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 Technology’s MED-4842 may be considered for use in human implantation for a period of greater than 29 days.

Product Details

Property Average result
Durometer 44 Type A
Tensile 1,070 psi
Elongation 400 %
Tear 250 ppi
Appearance White
Cure 10 minutes / 150 °C
Cure System Platinum
Extrusion Rate 215 g/minute
Mix Ratio 1:1
Specific Gravity 1.17
Stress @ Strain 540 psi / 200 %
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.

What is Medical Grade?

Discover how Medical-grade silicones are specifically designed, manufactured and purified to meet the strictest needs of the healthcare industry.

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