A lubricant is usually an oily liquid that reduces friction between two, usually metallic, surfaces. In addition, however, the lubricant can also improve the operation of the entire mechanism, dissolve foreign particles and old lubricant deposits or dissipate excess heat.
After application, lubricants form a protective layer on the surface, which protects the material from moisture penetration and oxidation.
They are also a perfect choice if you need to reanimate old lock mechanisms, hinges or motors. In addition to liquid lubricants, you can also find plastic ones. The best known and most common variant of these is Vaseline.