You could use one of those non-conductive liquids [1]. They have products with pour points going down below -100C. Depending on the interface between the liqu

You could use one of those non-conductive liquids [1]. They have products with pour points going down below -100C. Depending on the interface between the liquid nitrogen and the coolant it might still flow well. [1] https://www.3m.com/3M/en_US/data-center-us/applications/immersion-cooling/ https://www.3m.com/3M/en_US/data-center-us/applications/imme...