StarTech.com Thermal CPU Paste Compound for Heatsink Cooling HEATGREASE Improves the heat transfer between a CPU and heatsink to keep the CPU running cooler Effectively fills surface imperfections on CPU to prevent air pockets and help heat transfer Ceramic based compound that is electrically non-conductive for safe use around electronics Ceramic-based compound containing silicone Thermal conductivity of more than 1.066 W/m-K