Silicone Grease
Silicone greases are blends of silicone oil and thickeners (lithium soap, fumed silica, or PTFE) for lubrication, sealing, and thermal interface applications. Thermally conductive silicone greases for CPU/GPU cooling are the fastest-growing segment.
Key Properties at a Glance
| Base Oil | Dimethyl PDMS / Phenyl-methyl / Fluorosilicone |
|---|---|
| Thickener | Lithium soap, fumed silica, PTFE |
| Service Temperature | -50 °C to 200 °C (250 °C for high-temp grades) |
| Thermal Conductivity | 0.4 – 6.0 W/m·K (TIM grades) |
| Cone Penetration (NLGI) | Grades 1 – 3 (typical 250 – 320 1/10 mm) |
Range shown is category-wide; refer to individual grade COA for precise specs.
By End-Use/ 2
Thermally Conductive Silicone Grease (TIM)
Thermally conductive silicone grease (TIM) bridges the heat path between CPU/GPU/power-module dies and heat sinks. Typical thermal conductivity 1.0-6.0 W/m·K depending on filler choice (Al₂O₃, ZnO, AlN, BN). Applied in 50-200 μm bondline; re-pasteable for service.
Vacuum Silicone Grease
Vacuum silicone grease lubricates O-rings, ground-glass joints, and stopcocks in laboratory and industrial vacuum systems. Vapor pressure typically below 10⁻⁶ Torr at 25 °C; typical service for low-vacuum to high-vacuum (10⁻⁷ Torr) applications. Not suitable for ultra-high vacuum (UHV) or oxygen service.