250 ml concentrate for 5 liter solution. Rustyco ® RUST REMOVER is a unique product. It removes rust from all seams, cracks and crevices of steel, stainless steel, aluminum and most ferrous metals 100 percent of the pores. Without sanding or irradiation. This product is not a rust converter. Cleans surfaces microscopically clean while acting rust protection. The ideal base for all primers and color systems. The object can then be treated as new metal. Rustyco is a concentrate and diluted with water. With 1 liter Rustyco you make 20 liters of strong rust-remove-bath that can be reused several times until the solution becomes dark to black color. Rustyco is harmless compared with paint, plastic, wood, rubber, vinyl, glass, stainless steel, aluminum, copper, chromium, etc. No dangerous fogging, non-toxic, non-flammable, biodegradable and environmentally friendly.