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
£9.73
Each
Units
2.9W/m·K Silicone +200°C -40°C 20 ml Powdered Metal Oxides, Silicone Oil -40 → +200 °C -
RS Stock No. 554-311
BrandRS PRO
£5.20
Each
Units
0.65W/m·K Metal Oxide +200°C -40°C 20 ml Powdered Metal Oxides, Silicone Oil -40 → +200 °C -
RS Stock No. 707-4736
BrandRS PRO
£17.87
Each
Units
5W/m·K Silicone +180°C -40°C 30g - -40 → +180 °C -
RS Stock No. 503-357
BrandRS PRO
£8.35
Each
Units
- - - - 35 ml - - -
RS Stock No. 909-2092
BrandRS PRO
£67.15
Each
Units
3.4W/m·K - +125°C -30°C - - -30 → +125 °C -
RS Stock No. 707-4724
BrandRS PRO
£15.86
Each
Units
3.6W/m·K Silicone +180°C -40°C 30g - -40 → +180 °C -
RS Stock No. 915-6118
BrandRS PRO
£16.94
Each
Units
4W/m·K Non-Silicone +150°C -50°C - - -50 → +153 °C -
RS Stock No. 707-4733
BrandRS PRO
£11.28
Each
Units
1.8W/m·K Silicone +180°C -40°C 30g - -40 → +180 °C -
RS Stock No. 915-6105
BrandRS PRO
£13.14
Each
Units
2W/m·K Non-Silicone +150°C -50°C - - -50 → +150 °C -
RS Stock No. 915-6111
BrandRS PRO
£173.25
Each
Units
4W/m·K Non-Silicone +150°C -50°C - - -50 → +152 °C -
RS Stock No. 915-6109
BrandRS PRO
£95.19
Each
Units
2W/m·K Non-Silicone +150°C -50°C - - -50 → +151 °C -
RS Stock No. 180-5296
BrandRS PRO
£71.43
Each
Units
3.5W/m·K Aluminium Oxide - - 100g Aluminium Oxide - Paste
RS Stock No. 180-5300
BrandRS PRO
£62.59
Each
Units
2W/m·K Silicone +200°C -50°C 55 ml - -50 → +200 °C Paste
RS Stock No. 180-5304
BrandRS PRO
£126.89
Each
Units
3W/m·K Silicone +200°C -50°C 1kg - -50 → +200 °C -
RS Stock No. 180-5297
BrandRS PRO
£40.91
Each
Units
1.5W/m·K Non-Silicone +150°C -30°C 100 ml - -30 → +150 °C Paste
RS Stock No. 180-5301
BrandRS PRO
£22.02
Each
Units
2W/m·K Silicone +200°C -50°C 55 ml - -50 → +200 °C Thermal Putty
RS Stock No. 180-5310
BrandRS PRO
£45.69
Each
Units
1.4W/m·K Silicone +300°C -30°C 1kg - -30 → +300 °C Paste
RS Stock No. 180-5305
BrandRS PRO
£192.29
Each
Units
5W/m·K Silicone +200°C -50°C 1kg - -50 → +200 °C Paste
RS Stock No. 180-5298
BrandRS PRO
£57.29
Each
Units
3W/m·K Non-Silicone +150°C -30°C 100 ml - -30 → +150 °C -
RS Stock No. 180-5302
BrandRS PRO
£29.65
Each
Units
3W/m·K Silicone +200°C -50°C 55 ml - -50 → +200 °C -