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  • An uncatalyzed high consistency material
  • Catalyze with various peroxides to form a medium durometer rubber
  • Strained through fine mesh stainless steel screens to ensure freedom from particulate contamination


  • For fabricating molded and extruded silicone rubber parts
NuSil Technology’s MED-4174 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 1,200 psi (8.28 MPa)
Elongation 775 %
Tear 225 ppi (39.68 kN/m)
Appearance Translucent
Cure 5 minutes / 116 °C
Cure Rate Scorch 0.55 minutes
Cure Rate T90 1.7 minutes
Cure System Peroxide
Mix Ratio 1 PART
Post Cure 4 hours / 205 °C
Specific Gravity 1.15
Stress at Strain 325 psi / 200 % (2.24 MPa / 200 %)
Comment Uncatalyzed

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.