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LOCTITE STYCAST 2851FT – Epoxy Encapsulant – Encapsulation of components requiring heat dissipation, thermal shock resistance, and chemical durability

  • Item Name: LOCTITE STYCAST 2851FT
  • Manufacturer: Henkel Corporation
  • Product category: Epoxy Encapsulant
  • Technologies: One-component, solvent-free, 100% solids epoxy technology
  • Applications: Designed for encapsulating electronic components requiring efficient heat dissipation and resistance to thermal shock.
  • Color: Black
  • Cure type: Heat cure
  • Package size: Contact to Techniq VN for details
  • Shelf life: 6 months

1. Product Overview

LOCTITE STYCAST 2851FT is a one-component, solvent-free epoxy encapsulant designed for heat dissipation and thermal shock resistance. It features:

  • Low-temperature cure
  • High thermal conductivity (1.36 W/m-K)
  • Low coefficient of thermal expansion
  • Excellent resistance to industrial chemicals and solvents

2. Applications

Recommended for encapsulation of components requiring:

  • High thermal conductivity
  • Thermal shock resistance
  • Low expansion properties

3. Typical Properties

Uncured Properties Value
Viscosity @ 25°C 85,000 mPa·s
Viscosity @ elevated temp 33,000 mPa·s
Density 2.3 g/cm³
Shelf Life (0 to 8°C) 180 days
Cure Schedule
  • 1 hour @ 120°C
  • 2 hours @ 110°C
  • 5 hours @ 90°C
  • Post-cure (optional): 4 hours @ 150°C for improved properties
Cured Properties Value
Hardness (Shore D) 90 min
Thermal Conductivity 1.36 W/m-K
Coefficient of Thermal Expansion 31 ppm/°C
Moisture Absorption (24h) 0.06%
Heat Distortion Temperature 102°C
Arc Resistance 207 sec
Mechanical & Electrical Properties
Property Value
Impact Strength 0.16 J/cm
Compressive Strength 130 N/mm² (18,855 psi)
Flexural Strength 93 N/mm² (13,488 psi)
Tensile Strength 50 N/mm² (7,250 psi)
Volume Resistivity @ 25°C 1×10¹⁵ ohm-cm
Dielectric Constant (1 MHz) 5.2
Dissipation Factor (1 MHz) 0.02

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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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