Monoprice Silver Cool Thermal Compound for CPU (CL-PTSL-COOL) Thermal paste is an essential part of CPU cooling The paste is applied between the CPU and the heat sink and serves to maximize the transfer of heat from the CPU to the heat sink In addition to being used during the construction of a PC thermal paste is an essential part of PC maintenance Depending on the amount of heat generated the paste should be reapplied every 6-12 months thereby ensuring maximum life and operating efficiency of your PC Silver Cool is a specially formulated compound of Silver Oxide Metal Oxide Silicone and Carbon