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LOCTITE STYCAST ES 6501 – Epoxy Encapsulant – General purpose potting and encapsulation for electronic applications

  • Item Name: LOCTITE STYCAST ES 6501
  • Manufacturer: Henkel Corporation
  • Product category: Epoxy encapsulant for potting and encapsulation
  • Technologies: Two-component epoxy system with a rigid, low to medium viscosity formulation
  • Applications: Designed for general potting and encapsulation applications
  • Color: Mixed Black (Part A is a black liquid; Part B is a yellow liquid)
  • Cure type: Heat cure
  • Package size: Contact to Techniq VN for details
  • Shelf life: 240 days (in cool, dry conditions)

1. Product Overview

LOCTITE STYCAST ES 6501 is a two-component epoxy encapsulant designed for general potting and encapsulation applications. It offers a rigid cure with low to medium viscosity and requires heat curing.

2. Applications

  • Potting and encapsulation for electronic components
  • Suitable for applications requiring good electrical insulation and mechanical protection

3. Typical Properties

Uncured Properties
Property Value
Appearance – Mixed Black
Appearance – Part A Black liquid
Appearance – Part B Yellow liquid
Mix Ratio (by weight) 100:13 (Part A: Part B)
Mix Ratio (by volume) 4.59:1 (Part A: Part B)
Mixed Viscosity @ 25°C (cP) 3,380 (Spindle 3, 10 rpm)
Density 1.53
Working Time @ 25°C (100cc) 30 to 60 min
Shelf Life (Cool, dry conditions) 240 days
Curing Performance
Cure Condition Time
Room Temp (20-30°C) 12 to 24 hours
Heat Cure (60-85°C) 1 to 3 hours
Cured Properties
Property Value
Hardness (Shore D) 85
Glass Transition Temperature (Tg) 57°C
Coefficient of Linear Thermal Expansion 47 × 10⁻⁶ (Alpha 1: -10 to 30°C)
151 × 10⁻⁶ (Alpha 2: 70 to 110°C)
Thermal Conductivity 0.46 W/(m-K)
Moisture Absorption (24h immersion) 0.13%
Weight Loss (168 hrs @ 105°C) 0.17%
Electrical Properties
Property Value
Volume Resistivity (100 VDC) 22 × 10¹⁷ ohm-cm
Surface Resistivity (100 VDC) 7.7 × 10¹⁵ ohm
Arc Resistance 87 sec
Dielectric Constant / Dissipation Factor @ 1 kHz: 4.17 / 0.009
@ 100 kHz: 4.02 / 0.016
Dielectric Strength (0.02″ thickness) 1,175 V/mil

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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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