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  • Two-part, translucent fluorosilicone elastomer
  • Cures with heat via addition-cure chemistry
  • 50 mol% fluorosilicone
  • 1:1 Mix Ratio (Part A: Part B)


  • 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
  • For applications requiring resistance to solvents, oils and dimethyl silicone fluids
NuSil Technology’s MED50-5438 shall not be considered for use in human implantation for a period of greater than 29 days.

Product Details

Property Average Result
Durometer 31 Type A
Tensile 650 psi (4.48 MPa)
Elongation 350 %
Tear 36 ppi (6.35 kN/m)
Appearance Translucent
Cure 30 minutes / 150 °C
Cure Rate Scorch 1.35 minutes
Cure Rate T90 2.85 minutes
Cure System Platinum
Extrusion Rate 115 g/minute
Mix Ratio 1:1
Special Feature
Specific Gravity 1.25
Stress at Strain 300 psi / 200 % (2.07 Mpa / 200 %)
Work Time 16 hours
Comment 50M% Fluorosilicone Injection Molding Elastomer

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.

Read more

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.