EMPLOYEE FAVORITE! Mary Burnett says, ”Genuinely easy to apply & removes all traces of scum and mildew in minutes with no fumes”. KRC-7 Original is a specially formulated, cleaner/restorer for bathroom use, and other areas where the following surfaces are found. It will safely and effectively remove soap scum, hard water stains, rust, mineral deposits, grease, and other contaminates from non-slip tubs, acrylic, ceramic, fiberglass, plastic, stainless, copper, brass, aluminum and glass surfaces. KRC-7 does not contain any bleach, abrasives, caustic, muriatic acid or petroleum distillates. KRC-7 is non-flammable and non-fuming.