What Causes Rust Stains on Concrete, and How Do You Remove Them?

What Causes Rust Stains?

– Sprinklers fed by well water (high in iron)

– Metal furniture or grills left on wet concrete

– Battery corrosion from power tools or golf carts

– Fertilizer runoff with iron content

– AC condensate lines with oxidized parts

These stains look like orange drips, rings, or splatter marks—often appearing after rain or watering.

How to Safely Remove Them

You should never use high pressure or household bleach.

Instead, professionals use:

– Acid-based rust removers formulated for specific surfaces

– Controlled application to avoid streaking

– Neutralizing agents to prevent re-staining

– Proper PPE and environmental safety protocols

For best results, call a pro—especially for siding or large concrete areas.