Aqua Mix Eff-Ex Efflorescence Remover - Gallon Aqua Mix Eff-Ex is a heavy-duty cleaner that tackles efflorescence Removes efflorescence build-up and prevents efflorescence from forming Formula is safe, non-acidic, and has a neutral pH Ideal for marble, granite, slate, travertine, limestone, porcelain, cement, and more Each gallon will cover approximately 30 to 125 square feet