Bond It Builders complete Double strength Brick and Cement cleaner is a powerful 16 percent hydrochloric acid based cleaner used for cleaning masonry surfaces such as brick block work patio slabs and building facades these surfaces need to have a test on a small inconspicuous area first before full application, not for use on limestone or marble.
 
Will remove unsightly stains caused by numerous every day occurrences, as well as builders splatter. grime, oil, grease and other difficult-to-remove stains, from brickwork, patios, garages, paving, concrete floors and warehouses, used to remove mortar stains from brickwork Suitable for cleaning unsightly stains, algae, some paints, oils, limescale efflorescence salts from paths patios and driveways.