Neutral rust remover is a powerful neutral PH reagent. The rust removal time is 20-40 minutes. It can remove rust from ferrous and non-ferrous metals. It is designed for all kinds of steel, iron, cast iron, copper and aluminum. This product selectively interacts with the rust on the metal surface and removes the rust into the rust remover solution. This product can also be used in crevices, holes, spirals and other parts to remove rust safely and quickly.