Molykote high-vacuum silicone grease

Seals and prevents freezing of stopcocks and ground-glass joints in high-vacuum systems at pressures less than 10^-6 mm Hg. Heat stable (−40 to 204 °C), low vapor pressure, and chemically resistant. Colorless. 5.3 oz. tube.

Dow Corning^® high-vacuum silicone grease has been used:

• to coat the cloning rings used for hypoxanthine phosphoribosyltransferase (HPRT)-deficient cells selection and isolation
• to coat the cloning rings used for selecting the transformed cells during BALB/c cell transformation assay
• to seal a cover glass over a petri dish containing culture for bioluminescence detection

Corning is a registered trademark of Corning, Inc.