Arctic MX-4 Thermal Grease

Should not be used in place of Boron Nitride Paste. The primary application of MX-4 paste is for coating the top of a Mosquito® Conduction Heat Break in a liquid-cooled hotend.

Thermal grease for improving conduction in low-temperature areas such as heat sinks
Made from carbon microparticles, guaranteeing extremely high thermal conductivity
Metal-free and non electrically conductive