F9 Calcium and Efflorescence Remover is a breakthrough in the restoration and cleaning industry. It is a user friendly, full 31.45% strength muriatic acid replacement. This product combines a buffered, pleasant smelling acid along with an excellent soaping capability to work better at lower concentrations. F9 Calcium and Efflorescence Remover gives the user the advantage of a full strength product while greatly reducing fuming and corrosion, thereby improving overall health and safety risk profile. Features -Does not Burn Intact Skin -Up to 95% Less Fumes than Full Strength HCL Acid -Works Better than Full Strength Muriatic Acid with Less Harmful Effects -Quickly Removes Efflorescence, Calcium, Calcium Carbonate and -Hard Water Stains