Cooler Master PTK-002 Thermal Interface Material is a grease-like product that contains silicon material and is filled with thermally conductive and electrically insulating ceramics. Silicone compound provides appropriate viscosity for best interface between heat sink and heat-generating devices. The unique filler recipe of PTK-002 provides high thermal conductivity, best thermal stability, and excellent electrical properties over a wide range of temperatures. It is ideal for heat transfer between heat sink and electronic devices.