Home >

> Company Blog About Why is thermal grease still needed when metal surfaces are in direct contact?

Thermally Conductive Potting Compound

Why is thermal grease still needed when metal surfaces are in direct contact?

2026-08-31

Even after precision machining, metal surfaces are still uneven at a microscopic level. Direct contact results in numerous micrometer-sized air gaps, and since air is a poor conductor of heat, it severely hinders heat transfer. Thermal grease is used to fill these gaps.

Units 1210-1211, Block B, Building 6, Hengda Fashion Valley, Dalang Street, Longhua District, Shenzhen, Guangdong Province, China E-mail: sales11@hanastsilicone.com Tel: +8613670122311 Tel: +8613670122311

The Largest R&D and Production Silicone Potting Compound Supplier in China

8613670122311

13670122311 wechat

Silicone Potting Compound

Epoxy Potting Compound

Platinum Cure Silicone Rubber

Electronic Silicone Gel

Thermal Grease Paste

Liquid Hot Melt Adhesive

Thermally Conductive Potting Compound

Clear Liquid Silicone

Tin Cure Silicone Rubber

Squishy Silicone Gel

Food Safe Liquid Silicone

Polyurethane Potting Compound

Karstedt Catalyst

Silicone Pigment

Degumming Agent

Why is thermal grease still needed when metal surfaces are in direct contact?