ZINGA® only contains non-toxic elements in its dry layer (after evaporation of the solvent). Therefore it can be, and has been, used in contact with potable water. Since the ZINGA® remains active, it produces Zinc salts which dissolve in the water. This can sometimes lead to small precipitations in the water, which are however non toxic. To avoid this, we recommend to wash the surface very thoroughly with fresh water. For more information, contact a Zingametall representative.