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Yes, you can seal old concrete. The most important part of this process is the preparation. If you are planning on using the same type of concrete sealer on the existing surface, you may not need to remove it. But if the existing sealer is different from the new sealer, remove it carefully. Afterward, clean the concrete thoroughly and repair or fill in any cracks to create a smooth base to work with. Now, you are ready to seal your concrete.

A concrete overlay should be 1/4 of an inch to 2 inches thick to form a strong layer on top of a base slab. The thickness depends on the condition of the existing concrete and the depth of your design and imprints. You should repair and clean the surface before applying a primer and a layer of fresh concrete.

You may want to hire a concrete floor contractor to check out your home’s concrete surfaces or inspect your home’s foundation for minor damages they can fix while on site. They may be able to fix cracks in your driveway or garage floor the same day they fix your concrete steps, as well. General concrete repair experts often won’t be able to handle larger jobs, like leveling a sunken foundation , so you’ll need to hire a structural engineer for bigger projects.

The average cost of stamped concrete is around $12 per square foot, but you might pay anywhere from $8 to $28 per square foot. The average 12-foot by 12-foot patio costs $1,730 on average. Your exact pricing will depend on the patio’s square footage, the condition of the area where you want to pour the concrete, the desired stamp pattern, concrete coloring, concrete grade, and local labor prices. Don’t forget to budget for extra costs like land preparation and additional concrete fortifications if necessary.