Aqueous concentrate based on 47% phosphoric acid rust. for removing scale and oxide layer and for cleaning metal surfaces (iron. steel. copper. brass. aluminum). Contains corrosion inhibitors. Product conforms to Mil-C-10578 (Type III) specification. Heavy rust and scale (ferrous metals): dilute 1:3 with water. soak for 20 min to 1 h; heavy corrosion (non-ferrous metals): dilute with water 1:7-1:10. soak for 20 min to 1 h; cleaning of metal surfaces (ferrous and non-ferrous metals): dilute with water 1:15-1:20. can soak. use a brush. brush etc. Heating the solution (up to max. +65°C) increases the cleaning properties. Rinse the treated surfaces with clean water and cover with a corrosion protection agent. NB! It is an acid - handle with care! pH~1.