A thermally conductive adhesive bonds two parts together while transferring heat between them — replacing both mechanical fasteners and separate thermal pastes. Choosing the right one means balancing thermal performance with electrical, mechanical and process needs.
1. Thermal conductivity
Higher thermal conductivity moves more heat, but usually means higher filler content and cost. Match the conductivity to your actual power dissipation rather than over-specifying.
2. Electrical insulation vs conductivity
Ceramic-filled adhesives conduct heat but insulate electrically; silver-filled grades conduct both heat and electricity. Choose insulating grades when parts must stay electrically isolated. See our thermal adhesive range.
3. Rigidity vs flexibility
Rigid epoxy grades give the strongest bonds; flexible silicone grades absorb the stress of parts that expand at different rates. For large or dissimilar parts, flexibility matters.
4. Bond strength and gap filling
Decide whether the adhesive must be structural (load-bearing) or simply a gap filler between a component and a heat sink. Gap fillers prioritise conformability over strength.
5. Cure and process
Consider cure speed, viscosity and whether the product suits your dispensing equipment and line speed.
Quick selection guide
- LED modules — insulating, moderate conductivity, easy dispensing
- Power electronics — higher conductivity, structural strength
- EV batteries — flexible, flame-retardant, vibration tolerant
Send us your heat dissipation target and we’ll recommend a grade and sample.