High Vacuum grease 1

[adavidi]

Hello All,
I’d like to know your recommendation for high vacuum pump grease.
Currently I'm using FOMBLIN inert high vacuum grease RT-15, and I'm looking for a second source.
Can I apply the new recommended grease together with the old one?

 

[butelja]

Check into Dupont Krytox. It is used in numerous severe applications, including satellites in outer space. I would think that qualifies as high vacuum.