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LOCTITE STYCAST 5952-1 – Silicone Potting/Encapsulant – Encapsulation of transformers, rectifiers, power supplies, and heat generating modules

  • Item Name: LOCTITE STYCAST 5952-1
  • Manufacturer: Henkel Corporation
  • Product category: Silicone-based potting/encapsulation material
  • Technologies: Two-component silicone system (1:1 mix ratio)
  • Applications: Ideal for potting and encapsulating heat-generating electronic components such as transformers, rectifiers, thyristors, and power supplies.
  • Color: Part A is Red; Part B is White
  • Cure type: Heat cure
  • Package size: Contact to Techniq VN for details
  • Shelf life: Approximately 6 months (183 days)

1. Product Overview

LOCTITE STYCAST 5952-1 is a two-component silicone-based potting and encapsulant material. It is electrically non-conductive, offers good elongation strength, moderate tear strength, and high thermal conductivity. The product is designed for encapsulating heat-generating devices and applications requiring a non-corrosive casting and coating.

2. Applications

  • Typical Assembly Applications: Transformers, rectifiers, thyristors, power supplies, and heat-generating modules.
  • Other Applications: Thermally conductive roll coatings, heat sinks, and thermal pads.

3. Typical Properties

Uncured Material
Property Part A Part B Mixed
Appearance Red White
Viscosity @ 25°C (mPa·s) 60,000 25,000 30,000
Density (g/cm³) 2.05 2.125 2.05
Storage Life (days) 183 183
Mixed Pot Life @ 100°C (min) 100
Curing Performance
  • Standard Cure: 1 hour @ 100°C
  • Handling Time: 24 hours at room temperature
  • Optimal Performance: Additional post-cure of 2 hours at 175°C
Cured Material Properties
Property Value
Hardness (Shore A) 75
Coefficient of Linear Thermal Expansion (10⁻⁴ K⁻¹) 2
Elongation (%) 45
Thermal Conductivity (W/m-K) 0.8
Volume Resistivity @ 25°C (ohm-cm) 1×10¹⁴
Dielectric Constant @ 1 MHz 5.0
Dielectric Loss @ 1 MHz 0.01
Dielectric Strength (kV/mm) 17
Tensile Strength (N/mm²) 4 (580 psi)

4. Directions for Use

  1. Mixing: Thoroughly mix Parts A and B in a 1:1 ratio using power mixing.
  2. Air Removal: Evacuate the resin mixture to remove entrapped air.
  3. Application: Pour into the cavity or mold.
  4. Adhesion Improvement: Use PRIMER S 11NC to enhance adhesion to non-silicone materials.

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BERGQUIST microTIM mTIM 1028 is purpose built for riding cage assemblies in servers, switches, and routers, interfacing with electroless nickel plated copper or aluminum heat sinks. It ensures stable operation in high power transceiver modules while also extending applicability to liquid cooling components, heat pipes, and fin based dissipative structures.

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