• A solvent-free, thermosetting resin
  • Forms a transparent, rigid material that retains its cured properties over a broad temperature range (up to 300°C/570°F)
  • Has good dielectric properties at high temperatures and humidity
  • Excellent resistance to radiation
  • 100:1 Mix Ratio (CF-4721:Dicumyl Peroxide)


  • For encapsulating electrical and electronic units
  • For electronics and photonics applications

Product Details

Property Average Result
Refractive Index 1.52
Viscosity 125 cP (125 mPa*s)
Mmol 4.7 Vi/g
Appearance Clear
Cure 15 minutes / 150 °C
Durometer 75 Type D
Mix Ratio 100:1
Non Volatile Content 100 %
Specific Gravity 1.1
Volume Resistivity 63,000,000,000,000 ohmcm
Comment 75 Type D with Dicumyl Peroxide Catalyst (Catalyst Not Included)

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For over 40 years, the NuSil brand has offered a wide range of high-purity silicones. Our team is ready to collaborate with you to provide silicone solutions to satisfy your unique requirements. For additional guidance during your selection process, or to order a sample, contact NuSil today.

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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.