Erase rust stains effortlessly with the StoneCare4U Essential Rust Remover. This is a professional-grade, ready-to-use rust remover for use on many types of natural stone or concrete surfaces. It is effective for dissolving unwanted rust stains caused by products that contain iron, metal garden furniture, leaking heating systems, and so on. Importantly, the formula is safe and pH-neutral, making it suitable for use inside and outside. It has an easy-to-apply, gel-based formula that you can pour straight from the bottle. It attacks the rust stains whilst the chemical formula creates a purple-coloured reaction so you can see the remover working immediately. How To Apply: Prepare the area by cleaning off loose debris and ensure you have adequate safety wear, i.e. gloves, suitable protective eyewear, face mask and clothing. Generously apply the remover undiluted to the dry surface and distribute with a brush. Allow to work for about 5 minutes with a maximum of 10 minutes. Above all, do not allow the remover to dry. Lastly, after working time, rinse off with plenty of water. Please Note: working time must not exceed 10 minutes. You can repeat the procedure in case of unsatisfactory results. Please note that some stone and coloured concrete may change colour after treatment with the remover. Always try the product in an inconspicuous area before use. Always use suitable personal protective equipment (PPE) when using the remover. Coverage: Up to 10m² per litre. Coverage will vary depending on surface contamination. Quantity: 5L.