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Sealing resurfaced concrete is not an absolute necessity. However, it is recommended, and in most cases, a high-quality concrete sealer can protect the surface from stains as well as water penetration, extending the life of the resurfacing material. Some sealers are formulated to protect pigments from fading due to UV exposure. Sealer tends to enhance the colors in decorative resurfacing applications, making them more vibrant and richer compared to the duller, more faded appearance of concrete colors without sealer.

A concrete overlay on an existing slab can range from 1/4 of an inch to 2 inches thick, though a minimum of 2 inches is often recommended to ensure stability and quality. The ideal thickness depends on the condition of the existing concrete and the depth of any planned designs or imprints. Before applying the overlay, it's important to repair and clean the surface, then apply a primer. For specialized work like a stamped concrete overlay, hiring an experienced contractor is recommended to determine the correct thickness and ensure the new layer isn't too high or heavy. For context, most standard concrete slabs are between 4 and 6 inches thick.

Regular sealing and cleaning to maintain appearance and functionality.

You can seal a concrete slab by cleaning the surface, filling in any cracks, etching the surface, applying a sealer, and letting it dry. Concrete slabs don't typically need sealing, but you can use a topical concrete sealer if you notice signs of water damage. If you haven't already fixed the cause of the leak, then you'll want to repair the plumbing before you seal a concrete slab.