Formula HD Heavy Duty Ultrasonic Cleaner Formula HD is a powerful, aqueous-based caustic solution, specifically formulated for cleaning ferrous metals, and effectively removing heavy oil and carbon contaminants. Not suitable for aluminium, Formula HD is a highly alkaline, fully water rinseable detergent cleaner that is engineered to cavitate and de-gas efficiently. Formula HD is ideal for removing carbon deposits and cleaning moulds on steel substrates, including extrusion dies. Dilute with water to give a 5 - 30% solution concentration before use. • Removes heavy oils and carbon from parts and components in manufacturing and processing industries • Successful with soak and electro-cleaning applications • Ideal for cleaning steel mould tools, inserts, and extrusion dies • Removal of heavy oils and grease from ferrous metals • Removal of carbonised deposits from steel components