Dow Corning 340 Silicone Heat Sink Compound 5oz 142g White Silicone Thermal Coupling Heat Conductive Grease for Electrical Devices PCB Assemblies Computer CPU Heat Sink Non Flowing

Easy to use and spread over desired electronics.

Works as advertised.

This thermal compound is not ideal for computer CPUs—its thermal conductivity is barely above water at 0.67 W/mK, while even budget CPU pastes range from 1-2 W/mK. However, where it shines is stability. It won’t dry out like other compounds, making it a solid choice for voltage regulators, power transistors, and similar applications where reliability matters more than peak performance. Recommended with that caveat.

Satisfied customer

I had a large number of power resistors I needed to mount to a large metal plate for thermal control and this compound worked really well. I am getting dissipation through the plate better than I expected and the paste was easy to use and keep contained during the assembly process. I have been a big fan of some specialty Dow products over the years and this thermal paste delivered as I would expect!