this is not what you want - what it is for i do not know? space? 1 mile underwater or both? who knows
first off zinc? thermal compound used different shaped particales and highly conductive particles and metal.
silicone and zinc is not going to be as good as aritic silver or super fine alumnina or boran carbide or mix
per the manufacture site: "Industry standard zinc oxide filled silicone heat sink
grease for most applications. Will not soften at elevated
temperatures or dry out or harden. Meets Mil. Spec"
i would say this is for super high temps probably 300-500f for heat sinks on miltary equipent in the desert
on a radio lets say to cool mosfets in 150 f engine bay in the desert or somthing this is not cpu compound