There are many stain options on the market today from water based, to acid and also acetone dyes. If your looking for a more eco-friendly option I would go with water based stains. You can crate many wonderful options and blend many colors with the help of water. Acid stains react with chemicals that are already present in the concrete slab and give a unique one of a kind modeling effect. Acetone dyes give the same look as acid stains but you are in complete control of the modeling effect. Whether you seek a southwestern, traditional, contemporary, rustic or old world look, stained concrete floors make a stunning choice.