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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.

Concrete can take years to fully settle, but interior concrete floors are mostly settled after a year. Shifting and settling can occur throughout your home’s life, but most major settling happens the first few years after the concrete is poured. It’s not uncommon for minor cracks to appear in concrete floors over time—check with a concrete pro to ensure new cracks don’t indicate a structural issue in your home.

The cost for concrete coating services ranges from $3 to $15 per square foot. The final price is contingent on several factors, including the extent of surface preparation needed, the type of coating used, the total area being covered, and labor.

The benefits of epoxy floor coating include increased durability for concrete surfaces in the face of harsh chemicals, easy cleaning and maintenance, improved efficiency for underfloor heating, and an improved aesthetic over the dull surface of standard concrete floors.