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Yes, you can seal old or existing concrete, but proper preparation is crucial. The concrete surface must be clean, dry, and free of any incompatible old sealant. To check if an old sealer is present, drip a few drops of water onto the surface; if the water is absorbed in under five minutes, it's ready to be resealed. If you plan to use the same type of sealer that was previously applied, you may not need to remove the old layer. However, if you are using a different type of sealer, the old one must be completely removed. Before applying the new sealer, thoroughly clean the concrete and repair or fill any cracks to ensure a smooth, well-prepared surface.

The prevention steps are essentially the same, no matter the patio material. Keep the surface clean and maintained. Ensure there's no debris buildup, and cover the whole thing in a quality sealant. If it's the start of a season or it's been a while since you've cleaned the area, use a pressure washer.

Yes, it is possible to apply a concrete coating yourself, especially for smaller applications if you have the proper equipment. However, for larger projects, a professional application is recommended to ensure durability, slip resistance, and proper adhesion.

To keep your stamped concrete surfaces shiny, experts recommend resealing them every two or three years. Regularly cleaning your stamped concrete (at least twice per year, as part of routine maintenance) is another way to increase its sheen. Also, if you notice any spills or leaks, you should clean your stamped concrete as soon as possible to preserve its shine and prevent long-term damage.