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  • Two-part, high tear strength silicone elastomer
  • Medium durometer silicone
  • Cures with heat via addition-cure chemistry
  • Has a non-tacky surface and no volatile by-products or peroxide residues
  • Strained through a 400-mesh screen (minimum)
  • 1:1 Mix Ratio (Part A: Part B)


  • For a wide variety of fabrication techniques for the healthcare industry including: molding, calendering and extruding
NuSil Technology’s MED-4050 shall not be considered for use in human implantation for a period of greater than 29 days.

Product Details

Property Average Result
Durometer 50 Type A
Tensile 1,500 psi (10.34 MPa)
Elongation 985 %
Tear 250 ppi (44.09 kN/m)
Appearance Translucent Gray
Cure 10 minutes / 115 °C
Cure Rate Scorch 1.1 minutes
Cure Rate T90 2.6 minutes
Cure System Platinum
Mix Ratio 1:1
Specific Gravity 1.16
Stress at Strain 300 psi / 200 % (2.07 Mpa / 200 %)
Work Time 3.5 hours
Comment High Tear Strength

Encapsulation Technology

Watch our CareSil team explain the breakthrough Encapsulation Technology and demonstrate how easy it is to create transformative formulations with CES.

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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.