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liquid silicone rubbers lifesciences generalhealthcare

Premium Care




High Clarity Injection Molding Elastomer


  • Two-part, high clarity silicone system designed for use in injection molding equipment
  • Cures with heat via addition-cure chemistry
  • 1:1 Mix Ratio (Part A: Part B)


  • For the injection molding of parts requiring a high clarity / high durometer material including: molded rubber stoppers, gaskets, seals, valves, o-rings and other precision parts
  • Suitable for over-molding applications (may require use of a silicone primer for improved adhesion)
  • Can be used with NuSil’s Healthcare color masterbatches for applications requiring colored silicones

NuSil Technology’s MED-4971 shall not be considered for use in human implantation for a period of greater than 29 days.

Product Details

Property Average result
Durometer 68 Type A
Tensile 875 psi
Elongation 230 %
Tear 170 ppi
Appearance Translucent
Cure 15 minutes / 150 °C
Cure Rate Scorch 0.65 minutes
Cure Rate T90 2.7 minutes
Cure System Platinum
Extrusion Rate 85 g/minute
Mix Ratio 1:1
Refractive Index 1.4
Special Feature Specialty Liquid Silicone Rubbers
Specific Gravity 1.16
Stress @ Strain 580 psi / 100 %
Work Time >72 hours
Comment High Clarity Injection Molding Elastomer
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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