Concrete stains come down to 3 basic categories. Reactive Acid Stains, Non-Reactive Acrylic based stains & dyes and Solid (opaque) color stains which are used outdoors and contain solvents (VOC's) in their chemistry.
On this page, you see color charts for the Non-reactive Acrylic Stains from Perma-Pro as well as the stains from Smiths Color. These stains are the basis for traditionals acid stained flooring effects.
We are often asked why we prefer non-reactive staining materials to traditional reactive acid stain materials. It comes down to control and expectation. Reactive stains cannot be controlled. Once the material is applied and scrubbed into the surface, there is a chemical reaction which occurs over a 5 hour period. Problems arise where the concrete reacts poorly with the acids. Where this is the case, little color "takes" to the surface. Also, older concrete reacts less than new concrete. Any sealers must be removed prior as they will restrict the acids from reaching and reacting with the actual concrete slab. Unless the contractor who installed the slab can sign off to the fact there has not been any fly ash or similar non-reactive fillers/extenders added to the mix, the applicator does not have any indication it will react properly and transfer color to the concrete. It can be a mess. When acid staining occurs, there should not be anyone living in the space due to reactive vapors. Again, reactive stains can be a mess and disappointment.
We have GREAT control over color and depth of the tones applied. NON-reactive stains allow the clients to participate in reaching an end result they are seeking to achieve. As the stains are applied, they can direct the applicator as to "more or less" stain. Once dry, they can also feather on additional color(s). To get the most control of your project, non-reactive stains provide the most peace of mind.