Protex O is an oil-based protective fluid consisting of paraffinic bases with added anti-corrosive and anti-oxidant additives, specifically designed to protect semi-finished products or finished products that must withstand extreme storage or transport conditions. The product is easily applied by brushing on previously dried parts and can be removed with rags, industrial cleaners, alkaline solutions and/or petroleum solvents. The excellent covering capacity and the exceptional anti-rust power allow the product to effectively grip the part to be protected and ensure effective protection even in critical conditions for periods exceeding 12 months. The light graduation is suitable for protecting small components with even complex geometries; it is preferably used by immersion or spray but can also be dispensed by brush. The heavy grade, due to its high adhesive strength, is also used on large sized components and is preferably applied by brush or pad.