ScumBlaster is the most effective Tub & Tile Cleaner you will ever use More than a bathroom cleaner it can be used wherever hard water deposits or soap scum are a problem Dull surfaces become shiny and squeaky clean The cleaning power of ScumBlaster is comparable to that of muriatic acid yet this noncorrosive formulation is environmentally friendly non-fuming and safe for septic tanks ScumBlaster has been formulated using an organic salt that was designed as a safe replacement for traditional acids in industrial applications Deep cleans grout Contains no bleach or acids