This is an acid-stained basement floor cut into 3-1/2 foot square tiles. The color is Scofield's Dark Walnut Chemstain. The first photo above is the floor as it appeared the day after staining the concrete. The second photo shows the actual coloring of the floor after the acid stain residue was rinsed from the surface. Following that (lower left), a water-based acrylic concrete sealer was used as a primer to lock in a light amount of color enhancement. Then, a water-based epoxy concrete sealer was used as a finish coat for added gloss.