I opened a cube power supply to clean it of dust. When doing so, I observed that the external metallic case is used as a heat sink and is attached to the power supply's internals using a thermal grease. Since I don't think re-closing the power supply will result in a good thermal contact, I am considering replacing the thermal grease. Is anyone familiar with the specs for that thermal grease?
Dielectric grease.

I bought a tube at Canadian Tire for $7 and use it on everything. It even works on CPU's up tot he Pentium 4.