Rust stain remover is a true problem solver in the fight against stubborn rust stains and other metal oxide residues. Thanks to its particularly advanced formulation, Mellerud Rust Stain Remover works reliably and automatically deep into the surface, thoroughly and gently removing rust stains. The product is versatile and can be used on stone, tile, and ceramic surfaces both indoors and outdoors. Since Mellerud Rust Stain Remover is acid-free, it can also be used on more delicate natural stone surfaces such as marble, granite, slate, limestone, and sandstone. To remove rust stains, simply apply the product undiluted to the affected area, observe the automatic action (purple discoloration), and then rinse the product thoroughly with plenty of water and a brush. You will find that even older rust stains caused by iron-containing fertilizers, metal garden furniture, leaking water pipes, or heating leaks will disappear from your patios, walkways, driveways, walls, and garage floors in no time. So rest assured, if rust stains are tarnishing your surfaces, Mellerud provides you with an effective and easy solution to this problem.