Dow Corning DC-HI-VAC-5.3OZ Silicone-Based High Vacuum Grease, 5.3 oz. Tube Stiff, Non-Melting Silicone Lubricating Material Seals and lubricates chemical processing equipment. Sealing vacuum and pressure systems. Lubricating O-rings in binoculars and telescopes. Prevents fogging of delicate lenses. Lubricating plug valves, control valves, flow meter bearings, ceramic plug cocks, fire extinguisher valves, water treating equipment, synthetic rubber gaskets and seals in high temperature applications. Color: Translucent White Container Type: Tube Container Volume: 5.3 oz. Features: Good lubricating and sealing ability, Low volatility, Excellent resistance to water, chemicals, high and low temperatures