Kreatos Thermal Grease 12.3
The high-performance thermal compound in the Kreatos range, rated at 12.3 W/m·K. Built for makers who want maximum heat transfer from a hot end, heater block, or high-power board. Non-curing and non-conductive, it is a thicker paste that rewards careful application.
What it is
Thermal Grease 12.3 is the performance pick. At 12.3 W/m·K it sits at the upper end of practical thermal compounds, built to compete with the best maker and 3D-printer thermal pastes on raw heat transfer. It holds up through sustained high temperature, stays workable for years without curing, and will not conduct electricity near thermistor wires or heater leads. The tradeoff for that performance is body: it is a denser, thicker paste than the 1.8 or 5.0, so it takes a little more care to spread in a thin, even layer. Worth it where every degree of heat transfer counts.
Best for
- 3D printer hot ends and heater blocks
- Heat-break and thermistor seating
- High-power maker electronics and LED cooling
- Re-pasting high-temperature interfaces
- Workshop and lab equipment that runs hot
- Any interface where maximum heat transfer matters
What it does well
- 12.3 W/m·K, the top thermal conductivity in the range
- Holds up through sustained high temperature
- Non-curing, stays workable for years
- Non-conductive, safe near wires and contacts
- Long-term stability, very low evaporation loss
- Suitable for repeated re-application
Notes: Apply a thin, even layer between the surfaces. This is a thicker paste than the 1.8 and 5.0 grades, so take a little more care spreading it. For easier application on general or mid-power jobs, the 1.8 or 5.0 grades may suit better.