Noyen EP is a concentrated product for cleaning non-ferrous metals: copper and aluminium. It is perfect for removing very difficult industrial contaminants like: lubricants, baked-on residues, carbon deposits, oils, anti-adhesives etc. It is acidic and contains a large concentration of active ingredients, which effectively remove metal oxides and discolourations, brightening the surface. After using Noyen EP, the surace should be rinsed. The Noyen EP2 version can be used without rinsing (depending on the concentration). If the product is used for steel cleaning, the second rinsing should include a corrosion inhibitor – Noyen CI.