MB-3 Soap & Mineral Deposit Remover is specifically designed to safely dissolve soap and mineral deposits from natural stone, tile, glass and fiberglass. MB-3 Soap & Mineral uses a unique combination of special non-acid chemicals that quickly and easily dissolve and remove dingy, unsanitary soap scum and hard water deposits from shower walls, floors, doors, wash basins, and bath tubs. It does effortlessly what can't be done even by hard scrubbing with ordinary cleaners and abrasives. MB-3 Soap & Mineral Deposit Remover is highly effective and safe on most natural marble glossy surfaces. Be certain to test product on a spare tile or inconspicuous area for extra caution before use.