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Silicones Inc P-157

Silicones P-157 is a low viscosity, transparent silicone rubber used for potting or encapsulation of intricate parts where visual inspection is required. P-4 offers electrical stability, radiation resistance and will resist reversion when heated in confined spaces. Although it has high tensile strength, it can be easily cut and removed for part repair and then re-poured.

Polymer Name: Silicone Elastomer

Processing Methods: Potting

End Uses: Printed Circuit Boards

Features: Electrically Insulating, Excellent Transparency Properties, Low Viscosity, Platinum Catalyzed, Sound Damping

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Identification & Functionality

Chemical Family
Polymer Name
Technologies

Features & Benefits

Features
  • P-17 has excellent electrical insulating and thermal properties. It has improved mechanical properties and excels in those applications where mechanical stresses are applied. 
  • P-157 is a low viscosity, transparent silicone rubber gel used for potting or encapsulating intricate electrical parts where visual inspection is necessary.

Applications & Uses

Cure Method
Plastics & Elastomers End Uses
Plastics & Elastomers Processing Methods
Applications
  • P-157 has excellent electrical insulating properties and provides superior damping characteristics.

Properties

Physical Form
Typical Properties
ValueUnitsTest Method / Conditions
Coeff of Thermal Expansion1 x 10-4cm/cm/oC-
Cure Time (Hours)16 - 24--
Mixed Viscosity (+ 5000 cps)5000.0cps-
Mixing Ratio (B/A)100 / 10 --
Service Temperature-60 - 600°F-
Viscosity10000.0cps-
Volume Resistivity1 x 1014ohms/cm-
Working Time (Hours)2 - 4--

Storage & Handling

Shelf Life
6 months