Zinsser 12 oz. Watertite Etch and Cleaner (Case of 6) is a sulfuric acid-based etching and cleaning solution. Ideal for removing tough, caked-on efflorescence and excess mortar build-up on concrete, stone, brick, tile and galvanized metal when mixed with warm water. It also provides a light surface etch to promote the coating penetration and adhesion over concrete and other masonry surfaces.
California residents: see Proposition 65 information
- Prepares concrete for waterproofing and painting
- Removes efflorescence
- Safer than muriatic acid
- Fast and effective