Directions for use
Rust / scale removal
Use at a dilution of 5 to 25% (1 part in 20 to 1 in 4 with water) depending on the amount of rust/scale to be removed. Remove loose rust/scale with a stiff wire brush, and all traces of oil and grease before treatment. Apply by brush, cloth or spray or use in a dip tank (plastic, rubber-lined or stainless steel). For faster results, rub with steel wool. As soon as the surface is free of rust or scale, rinse off with clean water.
For descaling boilers etc. in situ pump solution of Star Rust Off HD around the system for a sufficient dwell time. Rinse thoroughly with clean water. For steel, to preserve the passivation film rinse with a 2% solution of Star RUST OFF HD. When dry, approx. 30 mins, the surface is ready for priming if required.
Cleaning/brightening of aluminium and metal
Use at a dilution of 6-10% (1 part in 15 to 1 in 10 with water). Rinse off thoroughly with clean water after sufficient dwell time and dry off. For steel, to preserve the passivizing film rinse with a 2% solution of Star Rust Off HD. Widely used for the cleaning of aluminium rolling stock and for cleaning plate heat exchangers (Not to be used on brazed heat exchangers).
Restoration of glazed surfaces; toilets, basins and bathrooms
Ingrained dirt, calcium, magnesium and lime scale deposits, rust and uric acid stains can be quickly removed. Use at a dilution of 10 %(1 part to 10 with water). First clean the surface to remove superficial dirt and grease. Apply the solution of PP400 by mop, brush or sponge and allow soaking for at least 10 minutes. For best results agitate the surface at the same time. Finally rinse the surface thoroughly with cold water.
Take normal precautions for handling acids. Star Rust Off HD must not be allowed to splash onto ropes as this can cause weakening of the fibres. Do not mix with bleach or any products containing hypochlorite.
Please read the Material Safety Data Sheet before using this product for detailed information on safety and health.