Water-based Color-Crete Interior Dyes impart interior concrete surfaces with an elegant decorative appearance more quickly and safely than acid-based stains. Apply and seal in as little as one day. The product comes in 13 standard colors, which can be blended for custom effects. It also can be used on overlays, or to adjust the color of previously stained floors. Clemons Concrete Coatings. www.ccc-usa.com.