If you have a concrete surface that is in need of repair, or you simply want to change its appearance, then a concrete overlay may be the perfect solution. Overlays are much more affordable than replacing an entire concrete slab, and they can be used for both functional and aesthetic purposes. What Causes Holes in Concrete Surfaces When concrete is mixed and then left to cure, tiny air bubbles that form in the self leveling compound as it dries can cause pin holes in the surface.
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