Use to clean and prepare old or new concrete block, brick, poured concrete, stucco, stone & tile prior to painting. Apply by scrubbing into the surface with stiff or wire brush. Rinse thoroughly with clean water after 20-30 minutes.
Crystals, when added to clean water, prepares and etches concrete, masonry, brick, stone, stucco and tile walls prior to painting. Removes efflorescence (alkaline, salt-like deposits), mortar stains & form-oil residue. Not for use on horizontal surfaces since may cause staining.
Read all information provided on product's instructions and label, including all cautions, before use.