Thermal Grizzly Kryonaut is recommended for sub-zero cooling because it avoids the potential issues of liquid metal becoming solid at very low temperatures.

“Probably some thermal grizzly cryionut. >> And the reason for that is that certain thermal compounds might perform great at ambient temperature or hot, like uh liquid metal, for instance, highly thermally conductive. But here's the thing. We're not going to be at room temperature. We're going to be ”