Grease ` O % u2019 Rings & Rubber Components Of Pneumatic valves based on a combination of Phenyl Methyl Silicon and Synthetic Ester oil, Brand:- Molykote 55 M Silicon Grease. RDSO. MP. MI- 15 ( Rev. 13 ) May- 2023 or latest, see page No. 4, S. No. 8. 5