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gels advancedengineering optoelectronics/electronics




Soft Low Tack Gel;Low volatility, 24 hr minimum potlife based on 2X initial viscosity


  • Two-part, low outgassing, clear silicone gel
  • 1.40 refractive index
  • Low modulus
  • Cures at room temperature or rapidly with heat
  • 1:1 Mix Ratio (Part A: Part B)


  • For protection of sensitive photonics assemblies from mechanical shock, thermal shock, dust, and ambient atmosphere
  • As an embedding or potting compound for environmental protection of electronic assemblies and components, such as LEDs
  • For applications requiring low outgassing and minimal volatile components to avoid contamination in sensitive devices
  • Extended work time allows voids in complex assemblies to fill in and permits time for any trapped air bubbles to float to the fluid surface and escape
  • UV and heat resistant
  • Handles stress during thermal cycling without cracking or delaminating
  • For applications requiring an operating temperature range of -65°C to 240°C (-85°F to 464°F)

Product Details

Property Average result
Viscosity 19,800 cP
Penetration 0.4 mm
Work Time 24 hours
Appearance Transparent
Cte 411 ppm/°C
Cure 30 minutes / 150 °C
Cure System Platinum
Dielectric Strength 350 volts/mil
Ionic Content Cl <5 ppm
Ionic Content K <1 ppm
Ionic Content Na <2 ppm
Mix Ratio 1:1
Operating Temperature -65 °C / 240 °C
Refractive Index 1.4
Volume Resistivity 100,000,000,000,000 ohmcm
Comment Soft Low Tack Gel;Low volatility, 24 hr minimum potlife based on 2X initial viscosity
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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