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  • A two-part, translucent silicone elastomer system
  • Cures at room temperature. Cure rate may be accelerated with heat.
  • Platinum addition cure
  • 1:1 Mix Ratio (Part A: Part B)


  • For use in potting, encapsulating, coating, and injection or transfer molding applications
NuSil Technology’s MED3-4220 shall not be considered for use in human implantation for a period of greater than 29 days.

Product Details

Property Average Result
Durometer 25 Type A
Viscosity 74,500 cP (74,500 mPa*s)
Work Time 15 minutes
Tensile 1,100 psi (7.59 MPa)
Appearance Translucent
Cure 30 minutes / 150 °C
Cure System Platinum
Elongation 624 %
Mix Ratio 1:1
Specific Gravity 1.11
Tear 74 ppi (13.05 kN/m)
Comment Flowable

The Strongest Silicone Elastomer Ever Developed

Dr. Jim Lambert, NuSil® Director of Research and Development, Biomaterials, introduces our breakthrough material that has a tensile strength of up to 50% greater than existing silicone elastomers on the market.

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The test data shown for this material is the average value for typical properties. All of these properties may not be tested on a lot to lot basis and cannot be used to draft specifications. Please contact NuSil for assistance and recommendations in establishing limits for product specifications.