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high consistency rubbers lifesciences generalhealthcare

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Low Tension Set, Uncatalyzed


  • Uncatalyzed, vinyl-functional, high consistency silicone elastomer
  • Requires the addition of a peroxide catalyst to accomplish vulcanization
  • Low tack surface
  • Strained through a 400-mesh screen (minimum)


  • For a wide variety of fabrication techniques for the healthcare industry including: molding, calendering and extruding of parts
  • Ideal for applications requiring a material with a low durometer, including: gaskets, seals, molded balloons, and catheter tips

NuSil Technology’s MED-4128 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
Tensile 1,010 psi
Elongation 800 %
Tear 70 ppi
Appearance Translucent
Cure 10 minutes / 116 °C
Cure Rate Scorch 0.55 minutes
Cure Rate T90 1.65 minutes
Cure System Peroxide
Mix Ratio 1 PART
Plasticity 65 mils
Post Cure 2 hours / 200 °C
Specific Gravity 1.11
Stress @ Strain 90 psi / 200 %
Comment Low Tension Set, Uncatalyzed
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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