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low viscosity elastomers advancedengineering electronics/optoelectronics





  • Two-part, low viscosity clear RTV silicone
  • Based on a dimethyl-diphenyl copolymer with a broad operating temperature range
  • 10:1 Mix Ratio (Part A:B)


  • For bonding, casting or injection molding of high performance optical components
  • For applications requiring index matching at 1.43
  • For photonics applications requiring low outgassing and minimal volatile condensables to avoid condensation in sensitive devices
  • For applications requiring an operating temperature range of -115°C to 260°C (-178°F to 500°F)

Product Details

Property Average result
Cure System Platinum
Viscosity 5,500 cP
Durometer 40 Type A
Tensile 600 psi
Elongation 125 %
Appearance Translucent
Cte 10 ppm/C
Cure 4 hours / 65 C
Dielectric Strength 550 volts/mil
Ionic Content Cl <5 ppm
Ionic Content K <1 ppm
Ionic Content Na <1 ppm
Lap Shear 180 psi
Mix Ratio 10:1
Operating Temperature -115 C / 260 C
Refractive Index 1.43
Specific Gravity 1.04
Volume Resistivity 1,100,000,000,000,000 ohmcm
Work Time 2 hours
Comment Low Volatility, 1.43 Refractive Index at 589nm. For applications requiring a broader operating temperature range. 180 psi (1.2 MPa), primed (LS1-3200) lap shear.
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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