Th IdealVac AR 555 PFPE Inert Grease is an excellent lubricant for sliding elastomer seals, and exhibits the chemical inertness typical of the FomblinŽ range. It has a very low vapor pressure and is suitable for use in the presence of gaseous and liquid oxygen under severe condition. Vapor pressure <10-7 mbar at 20 °C. Torr. Sold in syringe tubes of 100 grams. For MSDS of this AR 555 PFPE inert grease, see Available Downloads below.