How to Remove a Rust Stain From Concrete
Rust, or metal oxidation stains, are unsightly. Although rust is most often associated with metal, it’s a common issue on hard building surfaces, including concrete. Looking to effectively remove rust stains from roof tiles, walls, patios, pathways or driveways? You’ve come to the right place. We’ve got the trusted expertise you need.
On concrete, rust can be caused by water damage from metal fixtures but it’s also very common in a garden or horticultural settings where lawn products, containing iron sulphate, can spill over onto drives and patios. It will typically appear as a red or orange stain. To remove this requires special chemistry.
What products and equipment do you need?
OxiClear can remove iron, copper and lead metal oxidation stains from concrete building surfaces. It’s a non-penetrating acidic gel that can be applied with a paint brush. It’s more effective than water soluble oxidising agents, such as sodium hypochlorite.
How does it work?
It dissolves rust stains using phosphoric acid as the active ingredient. Its viscosity ensures that there’s no penetration to the substrate, no dribbling on a vertical surface and minimal back splash. The gel also does not evaporate, meaning it does not release any harmful fumes.
What's the cleaning process?
- Identify the stain
First, you will need to identify the stain to be sure that you are dealing with rust - Apply the product with a brush
Apply and leave to dwell 10 to 15 minutes, agitating with a soft brush to renew the active interface. The concentration of gel remains constant throughout the cleaning process - Remove the gel
After the 15 minutes is up, you can then remove and wash off the gel. If the film of metal oxide is particularly thick and stubborn, repeat the process again.
Note: this product is not suitable to dilute and should not be mixed with oxidising agents, bleach or alkaline materials.
