Corrosion remover which is mildly acidic. Rinses residue free. Ideal for non-ferrous and light metals, pcb's with water damage, glass, plastics, tarnished Brass and copper, scuba diving gear. Best used for removing contaminants like corrosion, Lime deposits, water damage, oxide layers, rust, grease, oil. Brightens Brass and copper alloys. Dilute with water to 1-5 percent complement your ultrasonic machine with elma cleaning concentrates for faster, safer, and more impressive results. Prolongs service life of your machine. Extra-long shelf life to prevent wastage. Eliminates contaminants without leaving a residue. Highly concentrated for creating gallons of solution.