Silicone high Vacuum Grease is a lubricant and sealant which is ideally suited for all high vacuum applications.  The grease is of uniform, soft consistency and can be used over a wide range of temperatures.  Important features of this high vacuum grease include good lubricating and sealing ability, excellent resistance to water, chemicals, high and low temperatures, and low volatility.  This grease can be used in applications operating down to 10^-8 torr.