What is an Acid Stain?

Just as the name implies, acid concrete stains use acids to etch and help transform the color of concrete. Either phosphoric acid or hydrochloric acid will be used, in addition to metallic salts, to cause chemical reactions in the surface of the concrete. These chemical reactions cause changes in the color of the concrete that cause the surface to look like natural stone or marble, which makes this a favored method among designers and homeowners.

[Read more…]