Assembly Lube Prepares potential wear surface and prevents metal contact before adequate lubrication can be supplied. Unlike other assembly lubes, Red Line’s will not plug filters after initial engine start-up. Provides 3x greater film strength than conventional black Molybdenum Disulfide greases. Excellent rust and corrosion inhibitor, allows for long-term storage. For use on camshafts, lifters, pushrods, piston skirts, main and rod bearings, and bolt threads.