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Dow High Vacuum Grease

Dow Corning High-Vacuum Grease is a stiff, nonmelting silicone lubricating material that maintains its consistency from -40 to 204°C (-40 to 400°F). It is used in applications similar to those for Dow Corning® Stopcock Grease, and is the recommended replacement for that product.
Dow Corning High-Vacuum Grease is recommended for vacuums reaching between 1 x 10-5 and 1 x 10 -6mm Hg. It is recommended that the grease be preconditioned under vacuum and temperature until these limits are reached.


• Seal and lubricate chemical processing equipment
• Lubricate plug valves, control valves, flow meter bearings, ceramic plug cocks
• Lubricate fire extinguisher valves
• Maintain vacuum and pressure systems
• Lubricate water-treating equipment
• Lubricate synthetic rubber gaskets and seals in high-temperature applications
• Lubricate laboratory equipment
• Lubricate O-rings on binoculars and telescopes
• Help prevent fogging of delicate lenses


Dow Corning High-Vacuum Grease is not recommended for use:
• In contact with liquid oxygen and should not be used in applications requiring LOX compatibility
• With silicone elastomers
• On surfaces to be painted; paints will not adhere well
• As a lubricant in metal bearings
This product is neither tested nor represented as suitable for medical or pharmaceutical uses.


Dow Corning High Vacuum Grease grease is available in:

50 gram tube – article number: 214-237

For other quantities please consult Eurovacuum BV or one of our dealers.

Technical data

Color Translucent: white
Penetration, unworked, mm/10: 185
Penetration, worked 60, max,mm/10: 205
Penetration, worked 100,000, mm/10: 227
Service Temperature Range °C (°F) -40 to 204 (-40 to 400)
Bleed, after 24 hr at 200°C (392°F), max 0.05%
Evaporation, after 24 hr at 199°C (390°F), max 1.1%
Specific Gravity at 25°C (77°F)  1.0 g/cc
Drop Point °C (°F) >300 (572)
Water Spray Off: 1.65%

Safety Data Sheet

Not available yet