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 lower temperatures (≥70°C)
  • 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

Product Profile - Full Details Product Profile
Safety Data Sheet Material Safety Data Sheet


The warranty period provided by Polymer systems Technology ltd (hereinafter “PST”) is from the date of shipment when stored below 40°C in original unopened containers. Unless PST provides a specific written warranty of fitness for a particular use, PST’s sole warranty is that the product will meet PST’s then current specification. PST specifically disclaims all other expressed or implied warranties, including, but not limited to, warranties of merchantability and fitness for use. The exclusive remedy and PST’s sole liability for Packaging Warranty 50 mL Side-by-Side Kit 200 mL Side-by-Side Kit 400 ml Side-by-Side Kit 2 Pint Kit (910 g) 2 Gallon Kit (7.28 kg) 10 Gallon Kit (36.4 kg), Inc. All rights reserved. Trademarks are owned by PST or its affiliates unless otherwise noted. breach of warranty is limited to refund of purchase price or replacement of any product shown to be other than as warranted. PST expressly disclaims any liability for incidental or consequential damages.



PST believes, to the best of its knowledge, that the information and data contained herein are accurate and reliable. The user is responsible to determine the material’s suitability and safety of use. NuSil Technology cannot know each application’s specific requirements and hereby notifies the user that it has not tested or determined this material’s suitability or safety for use in any application. The user is responsible to adequately test and determine the safety and suitability for their application and NuSil Technology makes no warranty concerning fitness for any use or purpose. PST has completed no testing to establish safety of use in any medical application. PST has tested this material only to determine if the product meets the applicable specifications. (Please contact PST for assistance and recommendations when establishing specifications.) When considering the use of PST products in a particular application, review the latest Material Safety Data Sheet and contact PST with any questions about product safety information. Do not use any chemical in a food, drug, cosmetic, or medical application or process until having determined the safety and legality of the use. The user is responsible to meet the requirements of the U.S. Food and Drug Administration (FDA) and any other regulatory agencies. Before handling any other materials mentioned in the text, the user is advised to obtain available product safety information and take the necessary steps to ensure safety of use.



PST disclaims any expressed or implied warranty against the infringement of any domestic or international patent/intellectual property right. PST does not warrant the use or sale of the products described herein will not infringe the claims of any domestic or international patent/intellectual property right covering the product itself, its use in combination with other products, or its use in the operation of any process.


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