Removing cement or mortar residues requires an acidic based patio cleaner. Lithofin Cement Away has a composition of special acids and cleaning components that is ideal for achieving a professional clean. This patio cleaner will effortlessly remove several residue materials, including mortar and cement, efflorescence, encrusted and engrained dirt, rust, calcium and limescale deposits. Due to the fact that this cleaner is acid based it is not suitable for use with stones that are not resistant to acid but can be used to clean porcelain and ceramic tiles, brick, clay and quarry tiles, terracotta, concrete and many natural stones.