Liquid Rubber Concrete Etch contains a granular base, that is mixed with warm water to create an etching solution suitable for removing Laitance and Efflorescence in preparation of concrete, stone, and masonry surfaces prior to coating. The life of any coating is dependent on adhesion to a clean, sound surface. Etching the surface removes contaminants and minutely roughens the surface, as well a neutralizing the PH of the concrete and masonry, to ensure strong adhesion and a long-lasting coating.