A pre-mixed, ready-to-use, mild acid solution. Removes dried Portland cement grout haze and mortar residue from tile, concrete and masonry. Safe for use on colored grouts. Removes hard water deposits, efflorescence and also etches concrete.
Liquid acidic treatment
For minor instances of grout haze, you might simply be able to remove it with some cheesecloth
Also effective for the removal of most hard water stains, rust stains, efflorescence and lime deposits