Acid Concrete, a new type of decorative concrete, is a compound formed by metallic salts and plugged acids of various natures. It is applied on concrete bases on self-leveling materials etc. and it develops with these a chemical reaction which produces colored salt crystals which fills the micro holes in the concrete base, coloring permanently the surface. It is possible to obtain visual effects that resemble the various marble and natural stones. They are offered in 6 standard colors and it is possible to create a big number of color tones. The acids can develop different colors if used on different concretes therefore it is advisable to carry out a color test before carrying out the work. Concrete Acid does not contain hydrochloric acid and it can be transported as non dangerous product also by air. Concrete Acid can be used also on imprinted floors, imprinted floors on low thickness and stone spray floors to improve the surface and to give different colors tones.