The experts at DIYNetwork.com show how to apply an acid stain look to concrete floor using environmentally friendly dye..Nawkaw manufactures and applies the world’s finest concrete stain, brick stain, and masonry staining. We are the leading experts in concrete stains!.Sublime Concrete is a professional decorative concrete installer who can reboth interior and exterior surfaces. Areas of specialty include acid staining, trowel down, micro finish, and thin stamped overlays..Concrete Acid Stain creates a unique and richly colored finish on indoor or outdoor concrete. Mix and match from colors choices. Perfect for any countertop, flooring, patio or outdoor concrete project..