If it's salt, it should dissolve in water. If not, you probably got calcium buildup. Mild muriatic acid (usually less than 10%) will normally dissolve calcium buildup. Rinse it with clear water as soon as the calcium is gone.
Re: Salt build up on stone and stamped concrete
If it's salt, it should dissolve in water. If not, you probably got calcium buildup. Mild muriatic acid (usually less than 10%) will normally dissolve calcium buildup. Rinse it with clear water as soon as the calcium is gone.
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