Bleach will not remove rust from concrete because it doesn't penetrate below the surface. Since concrete is highly porous, rust stains penetrate deep below the surface. Bleach reacts with the rust stain on the surface, turning them colorless, exposing the rust stains in the layers below.
What removes rust stains from concrete?
Steps for removing rust on concrete:
- Pour the lemon juice and/or white vinegar directly onto the stain.
- If combining both liquids, use a 1:1 ratio.
- Leave the solution on the concrete from 10 to 20 minutes.
- Vigorously brush the rust stain with the hard-bristle brush.
- Rinse the area with clean, cold water.
What is the best product to remove rust from concrete?
If you need to get rid of rust from concrete, your best bet is to use some WD-40 Multi-Use Product, and some elbow grease. WD-40 is specially formulated to be a penetrant, so when you spray it on a rusted surface, it gets to work right away by getting under the rust.
