AeroShell Grease 14 is the leading helicopter multi-purpose grease and is approved by all helicopter manufacturers. Owing to its anti-fret properties Grease 14 is particularly suitable for the lubrication of helicopter main and tail rotor bearings etc. AeroShell Grease 14 is a helicopter multi-purpose grease composed of a mineral oil thickened with a calcium soap possessing outstanding anti-fret and anti-moisture corrosion properties. It is oxidation and corrosion inhibited.