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Yes, you can seal an old concrete floor as long as you remove stains and repair damage before sealing. Remove everything from the garage and clear the floor throughout with a concrete cleaner and power washing. Fill in cracks larger than 1/8 of an inch wide and remove all grease and rust stains before sealing. Make sure your concrete is fully dried before applying sealer.

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.

Sealing a concrete surface protects it from damage caused by water, chemicals, and general wear and tear, making it last longer. A good sealer acts like a shield to prevent cracks, stains, and deterioration. Plus, it enhances the appearance of the concrete, giving it a fresh, polished look that can boost your property’s curb appeal.

Unlike staining concrete, painting concrete often results in chips and peeling over time. You can expect numerous touchups over the years if the concrete is in a high-traffic area. Since concrete paints are opaque, you may also find it more difficult to get the exact color results you want. Lastly, painting concrete can make it much more slippery unless you mix in an additive for traction.