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Dow Corning High Vacuum Grease

Dow Corning® High Vacuum Grease is a silicone-based, odourless, 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. It has good lubricating and sealing ability, as well as low volatility. Dow Corning High Vacuum Grease is also chemically resistant, and maintains its consistency over a wide temperature range from -40 to 204°C.

Dow Corning High Vacuum Grease is insoluble in water, methanol, ethanol, acetone, glycol, and glycerine. It can be dispersed in kerosene, stoddard solvent, benzene, toluene, ethyl ether, or petroleum ether.

Chemical resistance
Dow Corning High Vacuum Grease is unaffected by most vegetable and mineral oils, many organic compounds, and most common gases. It is also resistant to most aqueous solutions of inorganic salts and to dilute acids and alkalies. The suitability of this specialty lubricant should always be tested before the material is adopted for regular use.

Usable life and Storage
When stored at or below 20°C in the original unopened containers, this product has a usable life of 60 months from the date of production.


Good lubricating and sealing ability
Low volatility
Water insoluble
Chemical resistance
Stability in high and low temperatures


Chemical processing equipment
Vacuum systems
Pressure systems


Chemical processing equipment
Plug valves, control valves, fire extinguisher valves
Flow meter bearings, ceramic plug cocks
Synthetic rubber gaskets and seals
O-rings in binoculars and telescopes (prevents fogging of delicate lenses)

Typical Properties
Colour light grey, translucent
Consistency - penetrometer, unworked (mm/10) 175 - 210
Bleed at 30 hours, 150ºC (% max.) 3
Evaporation at 24 hours, 150ºC (% max.) 1
Density at 25ºC (g/ml) 1
Solidification Point (ºC) -40
Melting Point (ºC) None
Shelf Life (months) 60
A01 33 001-005 Dow Corning High Vacuum Silicone Grease 50g tube
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