Apiezon L is a silicone and halogen-free vacuum grease that has a vapor pressure from E-11 Torr at 20 °C to E-3 Torr at 300 °C and a melting point of <50 °C. Agilent vacuum grease is a non-silicon grease and has a vapor pressure in the E-6 Torr range.
Fel-Pro heavy duty anti-seize is a high-temperature, anti-galling lubricant designed for screw threads and other mated components of all types, useful in temperature ranges of 70 to 1315 °C.