How do you remove fertilizer rust stains from patio tiles?

Rust stains caused by fertilizers are a common issue on patio tiles and walkways made of natural stone. Fertilizers may contain iron salts which oxidize when they come into contact with moisture, creating brown or orange stains. These penetrate deeply into porous stones such as limestone or marble and are particularly stubborn. Many regular cleaners are ineffective or may damage the surface – especially on acid-sensitive stones. Acidic products can lead to dull spots, etching or discoloration. That’s why it’s important to use an acid-free product that dissolves rust effectively without harming the material. HMK R179 Rust Remover is specially designed to safely and efficiently remove such stains, including those caused by fertilizers or other iron-containing garden products.

HMK R179 Rust Remover neutralizes fertilizer stains on natural stone without etching or discoloring.

HMK R179 Rust Remover is a ready-to-use, acid-free cleaner developed specifically to remove rust and metal oxide stains from calcareous stones such as marble, travertine and limestone. It is especially suitable for fertilizer-related stains in outdoor areas. When reacting with iron particles, the product turns purple – a visual sign of active performance. This coloration disappears completely after rinsing. HMK R179 penetrates deeply without damaging the material and leaves no discoloration or etching. After a reaction time of 10–15 minutes, residues can be removed easily with water and an acid-free follow-up cleaner. It also contains rust-inhibiting ingredients to help prevent future stains, providing a protective benefit as well.