Rotating joint grease, silicone-free, Alsirol Alsirol. Silicone-free stopcock gr ase. Suitable for use with foodstuffs. No silicone derivatives, polymerisation o gumming. Excellent adhesion and viscosity. Stable grease film enables safe, long erm use . Low heat-up occurs during rotation even if operation is continuous. Whe sealing glassware systems with glass and metal stirrers and shafts Alsirol prote ts rotating, precision-ground sockets and stirring shafts against glass abrasion Also suitable for lubricating rotating metal and glass components. Acid and alk li resistant. For use under vacuum and high vacuum. Biodegradable.Non-toxic inno mal use.