MOLYKOTE HI-VAC SILICONE BASED HIGH VACUUM GREASE
Harmonization Code : 3403.19 | Lubricating Preparations (With 70% or More Petroleum Oils) For Automotive and Other Uses
Main features
- Low-Volatility Silicone Grease
- Less Than 0.5% Bleed
- Seals and Lubricates Vacuum and Pressure Systems
Product Description
MOLYKOTE® High-Vacuum Grease is a stiff, nonmelting silicone lubricating and sealing compound formulated with silicone oil and an inorganic thickener. Its low-volatility composition supports lubrication and sealing in vacuum and pressure systems, chemical processing equipment, valves, bearings, gaskets, seals, and O-rings. The grease resists water, many chemicals, common gases, and high- and low-temperature exposure, while reducing wear at plastic-to-metal and rubber-to-metal contact points. Typical performance includes less than 0.5% bleed and less than 2.0% evaporation after 24 hours at 200°C.
Key features
- Low-volatility formulation: Typical evaporation is less than 2.0% after 24 hours at 200°C, supporting use in vacuum-system sealing and lubrication.
- Stiff, nonmelting consistency: Maintains a stable compound form with no reported melting point and less than 0.5% typical bleed after 24 hours at 200°C.
- Environmental resistance: Resists water, many chemicals, common gases, and high- and low-temperature exposure.
Applications / Suitable for
- Sealing vacuum and pressure systems
- Lubricating plug valves, control valves, flow meter bearings, and ceramic plug cocks
- Lubricating synthetic rubber gaskets, seals, and O-rings
- Sealing and lubricating chemical processing and water-treatment equipment
- Lubricating O-rings in binoculars and telescopes
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Additional Information
As-supplied properties
Typical properties of MOLYKOTE® High-Vacuum Grease in its supplied condition. Values are not intended for use as specification limits.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Color | White to gray, translucent | — | Typical |
| Physical nature | Stiff compound | — | Typical |
| Penetration, unworked | 170 to 230 | mm/10 | ISO 2137 |
| Penetration, worked 60 | <260 maximum | mm/10 | ISO 2137; 60 strokes |
In-service performance properties
Typical high-temperature performance properties of this non-curing grease. Values are not intended for use as specification limits.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Bleed | <0.5 | % | CTM 0033A A; 24 hours at 200°C |
| Evaporation | <2.0 | % | CTM 0033A B; 24 hours at 200°C |
| Melting point | None | °C | Typical |
