NMD 80 is a powerful detergent-based solution designed for safe and effective removal of mortar smears and efflorescence from masonry surfaces. It can be used on all masonry substrates including brick, stone, synthetic stone, precast concrete, designer or colored block. It works great to remove polymeric sand haze. Additional Details ------------------------------ Product description: NMD 80 is a powerful detergent-based solution designed for safe and effective removal of mortar smears and efflorescence from masonry surfaces. It can be used on all masonry substrates including brick, stone, synthetic stone, precast concrete, designer or colored block. It works great to remove polymeric sand haze.