A good sealant with a silicone base can help reduce oil stains from forming, but if one occurs, there are a few things you can do.
If the Oil Stain is Still Liquid
If you catch it while the oil is still liquid, you’ll likely be able to remove it with a mild grease-cutting dish detergent. Start by applying the detergent to the oil stain. Then, use warm water to soak the oil stain and the surrounding area. Keep paper towels, cat litter, or sawdust nearby to soak up the solution and scrub the center of the stain with a nylon bristle brush.
You may be tempted to use a wire brush, but a wire brush could scratch the surface of your concrete and leave it vulnerable. Once everything is cleaned up, dispose of the oily papers, sawdust, or litter in a safe landfill site. If you don’t know where your local one is, you can contact your municipal public works department for help.
If the Oil Stain has Dried
If you’re dealing with dried-on oil stains, you can try a grease-cutting dish detergent mixed with hot water and following the steps for a liquid stain. This may be enough to lift the stain out. But, if it’s not, you can use a cleaning solution with an alkaline degreaser to help remove it.
Each degreaser may have slightly different instructions and best ways to use it, so it’s important to follow the instructions on the label. This will help you remove the oil stain and avoid any potential damage to your concrete.