1 lb

2 Lb. plastic bag of Crystals of Sulfamic Acid Cleaner for removing hard water ( Calcium Carbonate ) deposit from swamp / evaporator cooler , Removing dried Portland cement grout haze and mortar residue from tile, concrete, and masonry , descale heat exchange . It is a mild, safe to use, acid based cleaner. Do not use on marble or other polished stone. It is the main ingredient in Lime away cleaner. A Note About Shipping: I try to be as fair on my shipping charges as possible. Ebay and paypal takes 14.5% of the charges on the total sale ( including shipping ) . The rest may or may not cover my costs , If you feel that they are too high for your zip code, please contact me and I will let you know if I can ship to you cheaper than listed!