Polymer Systems
Technology Limited

Advanced Engineering



Potting and Encapsulating Elastomers

Optically Clear Silicone Elastomer

  • Two-part, optically clear, solvent free, low viscosity silicone
  • Cures at room temperature or rapidly with heat
  • Offers good physical and electrical stability across a broad range of temperatures
  • 1:1 Mix Ratio (Part A:B)
  • To provide protection of electronic components and assemblies against shock, vibration, moisture, ozone, dust, chemicals and other environmental hazards by potting or encapsulating
  • For photonics applications such as HBLEDs, photo detectors, lasers, discrete optics and flat panel displays that require a1.41 refractive index
Typical PropertiesAverage Result
Viscosity, Part A*1,200 cP (1,200 mPas)
Viscosity, Part B*800 cP (800 mPas)
Refractive Index*1.41
Work Time*5.5 hours
Volume Resistivity1 x 1014 ohm cm
Cured: 30 minutes at 150°C (302°F)
Durometer, Type A*30
Tensile Strength*120 psi (0.83 MPa)
Dielectric Strength600 volts/mil (23.6 kV/mm)
Moisture Absorption % gain after 168 hour exposure at 85°C (185°F) / 85% R.H. 0.10%
Ionic Content, Cl<5 ppm
Ionic Content, K<5 ppm
Ionic Content, Na<10 ppm
Glass Transition (Tg)-112°C
Coefficient of Linear Thermal Expansion (0°C to 150°C)337 ppm/°C (337µm/m/°C)

*Properties tested on a lot-to-lot basis. Do not use the properties shown in this technical profile as a basis for preparing specifications. Please contact NuSil Technology for assistance and recommendations in establishing particular specifications.


50 ml SxS Kit
2 Pint Kit (910 g)
2 Gallon Kit (7.28 kg)
10 Gallon Kit (36.4 kg)


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