Polymer Systems
Technology Limited

Advanced Engineering



Potting and Encapsulating Elastomers

Silicone Potting and Encapsulating Elastomer

  • Two part, Clear, 1:1 Mix ratio (A:B)
  • Pourable and self-leveling
  • Cures at room temperature
  • Tested per UL-94 and passed V-1
  • For potting, encapsulating and coating of modules, relays, and a variety of AC/DC converters including high power and planar packages
  • Provides protection from moisture, dust and contaminants
  • Increases resistance to shock and vibration
  • Low viscosity allows the potting of complex geometries without the entrapment of air
  • Pot life is compatible with processes that require dispensing or coating with Part A and B combined
  • Dielectric properties compatible with many devices and increase breakdown voltage of device
Typical PropertiesAverage Result
Appearance, Part ATranslucent
Appearance, Part BTranslucent
Viscosity, Part A13,000 cP
Viscosity, Part B9,000 cP
Work Time (Pot Life)8 hour minimum
Cured: 30 minutes at 150 °C (302°F)
Durometer, Type A20
Tensile Strength475 psi (3.3 MPa)
Elongation350 %
Tested per UL-94 *Passed V-1
Dielectric Constant, 100 Hz*2.9
Dielectric Constant, 100 kHz*2.6
Dissipation Factor, 100 Hz*0.0001
Dissipation Factor, 100 kHz*0.0001
Dielectric Strength *500 Volts/mil (19.5 kV/mm)
Ionic Content, Cl*> 5 ppm
Ionic Content, K*>3 ppm
Ionic Content, Na*> 1 ppm
Thermal Gravimetric Analysis (TGA)*,---
Weight loss 30°C to 380°C5%
Weight loss 30°C to 750°C60%
Glass Transition Temperature (Tg)*-45°C
Coefficient of Thermal Expansion (-25°C to 250°C)*320 µm/m°C
Moisture Absorption, % gain after 168 hour exposure*0.2%
at 85°C (185°F) / 85% R.H.---
% Linear Shrink (1 hour at 100°C)*2.5%
% Linear Shrink (1 hour at 150°C)*3.8%
Recommended Cure Times based on 90% cured via ODR† 
Cure time at 70°C4 hours
Cure time at 100°C30 minutes
Cure time at 150°C20 minutes

*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.

†Recommended cure times are based on the testing performed via ODR (Oscillating Disk Rheometer). However the cure times can be affected by multiple factors, including, but not limited to, quantity of silicone used, time to heat the entire device or mold, and whether the material is cured in pre-heated oven or not.

Recommended Primer CF1-135

Note: Some bonding applications may require the use of a primer.


50 mL Side-by-Side Kit
400 mL Side-by-Side Kit
2 Pint Kit (910 gram)
2 Gallon Kit (7.28 kg)
10 Gallon Kit (36.4 kg)


12 Months

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