47% phosphoric acid based aqueous concentrate for removing rust, scale and oxide layers and for cleaning metal surfaces (iron, steel, copper, brass, aluminum). Contains corrosion inhibitors. The product complies with the Mil-C-10578 (Type III) specification. Heavy rust and scale (ferrous metals): dilute with water 1:3. 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 metal surfaces (ferrous and non-ferrous metals): dilute with water 1:15-1:20. Can be soaked. Use a brush. Paintbrush, 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! This is an acid - handle with care! pH~1.