The Simson Penetrating Oil is transparent for universal lubrication. The oil can free rusted mechanical parts, because it can penetrate into the narrow space between the threads of two parts. Spray the Penetrating Oil on a desired part for a lubrication and protective coating against corrosion and squeaking and creaking of parts. The Simson penetrating oil comes in a 100ml bottle with dropper for precise dosing on the desired part.