Isaac Baghdanov
New member
Red brick, with white crap leaching out of grout. I called eacho chem, and used calcite presoak, then nmd80 as the white crap isn't powdery. When I applied the mnd80, it turned green which indicates no calcium is present. I immediately rinsed as per instructions. So if it's not efflorescence, or calcium what is it? How to remove? I don't want to call eaco chem again, as they use nmd80 as a cure all.