Description: The F9 Calcium and Efflorescence Remover is a development in the cleaning and repair sector. This solution combines a buffered, pleasant smelling acid with exceptional soaping power to perform better at lower concentrations. F9 Calcium and Efflorescence Remover offers the user a full strength solution while greatly reducing fuming and corrosion risk to one's overall health and safety. It functions better than full strength muriatic acid with less side effects and removes efflorescence, calcium, calcium carbonate, and hard water stains quickly.