Thermal compound is necessary to create a reliable transfer of heat from your computer's processor to its heatsink to keep your CPU from overheating.

This thermal grease can be used on the rear side of the heatsink which has no thermal pad. It will improve the heat dissipation of your processor.

This thermal transfer compound improves the effectiveness of CPU coolers by thermally bonding the CPU to the heatsink.

This ensures that the heatsink and fan can work at their full capacity to remove the harmful heat away from the CPU, and prevent burnout or heat damage.
 
Specifications:
 
Type: Silicone Fluid with 20% Metal Oxide
Thermal conductivity: 1.829 W/m-k
Thermal resistance: 0.123 C-in2/w
Dielectric Breakdown: 5.0 KV ac
Paste Colour: Grey
Contents: 2 x 1g (Approx) - each tube is enough for 1 to 3 applications - depending on the size of the CPU heatsink