It can be used on all masonry substrates including brick, stone, synthetic stone, precast concrete, designer or colored block. Works great to remove polymeric sand haze. The added buffering ingredients allow NMD 80 to be powerful yet safe enough for glass and anodized aluminum. NMD 80 requires no respirator when working outdoors, preventing unnecessary fines. This product is capable of extremely effective cleaning and efflorescence removal without brushing or scrubbing and will leave the cream on the mortar joints.