MUD has been developed for the specific purpose of cleaning and removing hard water deposits, soil, and soap build up from marble, granite, terrazzo, glass, fiberglass, polished metal and other smooth surfaces. This unique formulation allows you to remove the unwanted contaminates while improving the look of delicate surface. Some popular applications for MUD are: bathtubs, showers, plumbing fixtures, mirrors, boats and automobiles. MUD is a non-toxic neutral compound that is extremely user friendly.