| You actually should be using MURIATIC ACID to etch the concrete. - One cup for 2 gallons of water should do the trick in a insecticide sprayer. Wash thoroughly, dry completely (maybe use a weed burner blow torch hooked up to a propane tank for this job). Anyway, without drying completely you run the risk of your sealant not properly holding. I would recommend Sani-tred to coat it. Thoroseal works but you'll have to leach the lime out before you can use it, just like any other concrete base product. |