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MG Chemicals 8329TFS - Thermal Adhesive. Long Working Time, Flowable

8329TFS is a 2-part, heat-cure, thermally conductive epoxy adhesive with a 4-hour working time. It is a dark gray, smooth, thixotropic paste that cures to form a hard, durable polymer that is thermally conductive, yet electrically insulating. This thermally conductive adhesive is used to glue heatsinks to LED’s, CPU’s, and other heat generating components. This product cures slowly. For a faster cure version, use 8329TFF or 8349TFM.

Product Type: 2K (2 component) Adhesive, Conductive Adhesive

Application Area: Printed Electronics

Cure Method: Heat Cure

Compatible Substrates & Surfaces: Metal, Plastics

Application Method: Injection

Chemical Family: Epoxy & Epoxy Derivatives

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Knowde Enhanced TDS

Identification & Functionality

Features & Benefits

Key Attributes
  • High thermal conductivity
  • Long working time
  • Provides strong electrical insulation
  • Bonds well to a wide variety of substances
  • Strong resistance to humidity, salt water, mild bases, and aliphatic hydrocarbons

Applications & Uses

Application Area
Application Method
Compatible Substrates & Surfaces
Cure Method
Recommended Preparation

Clean the substrate with Isopropyl Alcohol, MG #824, so the surface is free of oils, dust, and other residues.

Syringe or Cartridge

  • Twist and remove the cap from the syringe or cartridge. Do not discard cap.
  • Dispense a small amount to ensure even flow of both parts. A manual or pneumatic dispensing gun is required for a 50 mL cartridge.
  • (Optional) Attach a static mixer.
    • Dispense and discard 3 to 5 mL of the product to ensure a homogeneous mixture.
    • After use, dispose of static mixer.
  • Without a static mixer, dispense material on a mixing surface or container, and thoroughly mix parts A and B together.
  • To stop the flow, pull back on the plunger.
  • Clean nozzle to prevent contamination and material buildup.
  • Re-place the cap on the cartridge or syringe.

Dispensing Accessories

Consult the table below for accessory selection. See the Dispensing Accessories Application Guide for usage instructions. 8MT-50-FT should only be used with a pneumatic dispenser.

Cat. No. Dispensing Gun Static Mixer
8329TFS-25ML N/A N/A
8329TFS-50ML 8DG-50-1-1 8MT-50, 8MT-50-FT

Properties

Color
Physical Form
Thermal Properties
ValueUnitsTest Method / Conditions
Thermal Conductivity (at 25 ˚C)1.2W/(m·K)
Typical Properties
ValueUnitsTest Method / Conditions
Viscosity (at 25 ˚C)ᴮN/A
Viscosity (at 25 ˚C)ᴬ700Pa·s
Cured Properties
ValueUnitsTest Method / Conditions
Resistivity1 x 10¹²Ω·cm
Hardness Shore D68
Tensile Strength4.2N/mm2
Compressive Strength42N/mm2
Lap Shear (Stainless steel)5N/mm2
Lap Shear (Aluminum)6.3N/mm2
Glass Transition Temperature (Tg)9˚C
CTE Prior Tg47ppm/˚C
CTE After Tg164ppm/˚C
Service Temperature Range-40 to 150˚C
Uncured Properties
ValueUnitsTest Method / Conditions
Mixed Density2.11g/mL

Regulatory & Compliance

Chemical Inventories

Technical Details & Test Data

Cure Instructions

The product will not cure at room temperature. Cure the adhesive in an oven at one of these time/ temperature options:

Temperature 65 °C 80 °C 100 °C
Time 3 hours 80 minutes 30 minutes
Usage Parameters
Working Time 4 h
Mix Ratio by Volume 1:1
Mix Ratio by Weight 1:0.96

Packaging & Availability

Packaging Type
Packaging and Supporting Products
Cat. No. Packaging Net Volume Net Weight
8329TFS-25ML Dual Syringe 25 mL 52.2 g
8329TFS-25ML Dual Cartridge 45 mL 94 g

Storage & Handling

Shelf Life
3 Years
Storage and Handling

Store between 16 and 27 ˚C in a dry area, away from sunlight (see SDS). To maximize shelf life, recap product firmly when not in use.