H.B. Fuller FH8633

H.B. Fuller FH8633 is a one-component, thermal-curable adhesive with fast curing at low temperatures, low shrinkage, and high adhesive strength. It can adhere to a variety of substrates and has excellent thermal performance, making it suitable for high-temperature applications. This material also provides high bond strength on various substrates.

Product Type1K (1 component) Adhesive, Reactive Adhesive, Thermal Adhesive

Application AreaElectronic Components

FeaturesFast Cure, Good Adhesion, Good Thermal Stability, Low Shrinkage, Low Temperature Curing

Technical Data Sheet

Enhanced TDS

Identification & Functionality

Features & Benefits

Features and Benefits
  • One component; no mixing required
  • Low cure temperature
  • Very fast curing
  • High bond strength on a variety of substrates
  • Excellent thermal performance

Applications & Uses

Application Area
Cure Method
Application Instructions

1. Coating surface area should be clean and free of any fluxes, residues, dust or any other contaminants.
2. Bring material to room temperature (25°C) before using (typical thaw time for 10ml syringes is 2-4 hours). We do not recommend thawing the material more than 3 times.
3. If the material is left idle in the syringe tip for an extended period of time, the tip should be purged or solvent cleaned.
4. Seal any remaining material and store immediately at -18°C.


Black paste
Cured Properties
ValueUnitsTest Method / Conditions
Glass Transition Temperature31.0°C
Coefficient of Thermal Expansion (Alpha 1)61.0m/m.°C
Coefficient of Thermal Expansion (Aplha 2)196.0m/m.°C
Lap Shear Strength (Fr₄ - Fr₄)19.4MPa
Tensile Strength16.6MPa
Hardness75.0Shore D
Uncured Properties
ValueUnitsTest Method / Conditions
Viscosity (25°C, CP52, 10 rpm)16530.0cP
Thixotropic Index (1.0/10.0 rpm)5.1
Typical Cured Properties
ValueUnitsTest Method / Conditions
Pot Life3.0days

Technical Details & Test Data

Curing Profile

Recommended cure:

  • Cure @ 80°C for 5 min

Storage & Handling

Shelf Life
6 Months
Storage Conditions

Product should be stored at temperature -20℃ in the unopened container in a dry location.