M-222 Citrus Concrete Cleaner is a highly concentrated water-soluble powdered degreaser and cleaner which is designed for use on concrete and a wide variety of other washable surfaces. This super heavy-duty product quickly emulsifies grease build-up and tough grime. It is safe to use on any surface not damaged by water, including wood, plastics, metals and painted surfaces. M-222 is biodegradable, non-toxic, non-corrosive and non-caustic for added safety. Color changes from an orange powder to lime green in solution.