Remove tough stains easily with this ZUD Heavy-Duty Cleanser. The powerful formula removes rust, hard water deposits and other tough stains. The rust stain remover is suitable for use both indoors and outdoors. You can use it in the kitchen or bathroom to clean countertops, appliances and porcelain or stainless-steel sinks, toilets, grouting and tile. ZUD Heavy-Duty Cleanser also works outdoor to clean grills, hand tools, aluminum doors and windows. It comes in a convenient 16 oz can.