37+ Cleaning Basement Walls With Muriatic Acid Pics. Homeowners should never reach for muriatic acid lightly. The white powder that builds on concrete walls and floors is a soluble salt called efflorescence and is a if you plan on painting your basement's concrete floor, you need to prep it first with muriatic acid.
In fact, muriatic acid can be an effective tool when cleaning most (if not all) types of stone, masonry, and other similar hard materials.
Mix the acidic solution make a solution by adding one part acid to three parts water. Before adding acid to it. I am prepping my concrete floors for epoxy. Muriatic acid is strong stuff.