What is Dow Corning high vacuum grease used for?
 
 

Dow Corning® High Vacuum Grease is a silicone-based, odorless, translucent white-grey grease suitable for use in sealing and lubricating. A stiff, non-melting silicone material, Dow Corning High Vacuum Grease seals and lubricates valves, bearings, gaskets, O-rings, and vacuum and pressure systems.