Thermal Grease

Thermal grease is known by a number of names including:
• CPU grease
• heat paste
• heat sink compound or paste
• thermal compound, gel or paste
• thermal interface material.
It is a thermally conductive material which is usually electrically insulating which helps to dissipate heat from a device. Its main function is to ensure there is no air space between which would act as a thermal insulator. It fills in the microscopic imperfections on the heatsink and device.
It is most commonly used between a CPU and a heat sink to maximise heat transfer. It is also used on other electronic components which create heat and also need a heat sink such as MOSFET transistors.
There are other types of products to eliminate the air gap under a heat sink:
• Thermal Adhesive
• Thermal Gap Pads

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Description Price Thermal Conductivity Material Maximum Operating Temperature Minimum Operating Temperature Pack Size Chemical Component Operating Temperature Range Physical State
RS Stock No. 217-3835
BrandRS PRO
£9.54
Each
Units
2.9W/m·K Silicone +200°C -40°C 20mL Powdered Metal Oxides, Silicone Oil -40 → +200 °C -
RS Stock No. 554-311
BrandRS PRO
£5.10
Each
Units
0.65W/m·K Metal Oxide +200°C -40°C 20mL Powdered Metal Oxides, Silicone Oil -40 → +200 °C -
RS Stock No. 707-4736
BrandRS PRO
£17.52
Each
Units
5W/m·K Silicone +180°C -40°C 30g - -40 → +180 °C -
RS Stock No. 909-2092
BrandRS PRO
£66.16
Each
Units
3.4W/m·K - +125°C -30°C - - -30 → +125 °C -
RS Stock No. 707-4724
BrandRS PRO
£15.55
Each
Units
3.6W/m·K Silicone +180°C -40°C 30g - -40 → +180 °C -
RS Stock No. 915-6118
BrandRS PRO
£16.61
Each
Units
4W/m·K Non-Silicone +150°C -50°C - - -50 → +153 °C -
RS Stock No. 707-4733
BrandRS PRO
£11.06
Each
Units
1.8W/m·K Silicone +180°C -40°C 30g - -40 → +180 °C -
RS Stock No. 915-6105
BrandRS PRO
£12.88
Each
Units
2W/m·K Non-Silicone +150°C -50°C - - -50 → +150 °C -
RS Stock No. 915-6111
BrandRS PRO
£170.69
Each
Units
4W/m·K Non-Silicone +150°C -50°C - - -50 → +152 °C -
RS Stock No. 915-6109
BrandRS PRO
£93.78
Each
Units
2W/m·K Non-Silicone +150°C -50°C - - -50 → +151 °C -
RS Stock No. 180-5313
BrandRS PRO
£332.29
Each
Units
5.2W/m·K Silicone +300°C -30°C 1kg Carbon Black Mesoporous, Metal Filler, Methyltriacetoxysilane, Silicone-A -30 → +300 °C Paste
RS Stock No. 180-5314
BrandRS PRO
£68.42
Each
Units
2W/m·K Silicone +200°C -60°C 200mL - -60 → +200 °C Paste
RS Stock No. 180-5303
BrandRS PRO
£95.95
Each
Units
2W/m·K Silicone +200°C -50°C 1kg - -50 → +200 °C Paste
RS Stock No. 180-5306
BrandRS PRO
£3.99
Each
Units
1.4W/m·K Silicone +300°C -30°C 20g - -30 → +300 °C Paste
RS Stock No. 180-5296
BrandRS PRO
£68.68
Each
Units
3.5W/m·K Aluminium Oxide - - 100g Aluminium Oxide - Paste
RS Stock No. 180-5309
BrandRS PRO
£16.61
Each
Units
5.2W/m·K Silicone +300°C -30°C 20g Carbon Black Mesoporous, Metal Filler, Methyltriacetoxysilane, Silicone-A -30 → +300 °C Paste
RS Stock No. 180-5304
BrandRS PRO
£122.01
Each
Units
3W/m·K Silicone +200°C -50°C 1kg - -50 → +200 °C -
RS Stock No. 180-5307
BrandRS PRO
£4.80
Each
Units
2.7W/m·K Silicone +300°C -30°C 20g - -30 → +300 °C Paste
RS Stock No. 180-5297
BrandRS PRO
£40.91
Each
Units
1.5W/m·K Non-Silicone +150°C -30°C 100mL - -30 → +150 °C Paste
RS Stock No. 180-5310
BrandRS PRO
£44.79
Each
Units
1.4W/m·K Silicone +300°C -30°C 1kg - -30 → +300 °C Paste