Marblelife Soap Scum Remover is a truly unique product, in that it is an abrasive that will absolutely not scratch sensitive marble, travertine, slate or natural stone showers, including glass, metal and plastic enclosures and fixtures. This product is odorless, easy to use and cuts soap scum like it’s not even there. What’s even better, Marblelife Soap Scum Remover can be rinsed away, rubbed away or allowed to dry and be buffed off depending on what is easier for you in each situation. Marblelife Soap Scum Remover also helps remove hard water spots. Depending on the severity, it can completely remove, or significantly reduce the appearance of, hard water spots. Absolutely a fantastic product.