An effective, safe alternative to acidic compounds for cleaning brick, tile and concrete surfaces. Safety Klean rids new masonry construction of excess mortar, dirt and other common job site soiling. It is ideal for projects where traditional acidic cleaners are not permitted. Non fuming Safety Klean contains no hydrochloric or other traditional inorganic acids and is safe for use on and around most metal surfaces, indoors or out. It is up to 70% more effective than citric and glycolic acids, and 50% more effective than phosphoric acid.