Color: Grey, Weight - 10g. The heat sink paste is metal free and non electrical conductive which eliminates any risks of causing short circuit, adding more protection to the CPU and VGA cards. This HY500 series thermal grease offer better cooling performance with high thermal conductivity graphite and powder. This thermal grease should be used to fill the gaps and expanding cooling area between the component and the heat sink. Use this whenever you’re connecting a component to a heatsink, it’ll really help to dissipate even more potentially damaging heat.