Water-based Black impregnating sealer for restoring the appearance of all types of faded dark natural and artificial stone, including limestone, marble, slate, and concrete pavers. Ensure the surface to be treated is completely clean, dry, and free from dirt, grime, cement, and grout. If necessary, first wash surfaces with a dilute solution of LTP Grimex 1:5 and scrub with a white nylon pad. Rinse well to remove residues and leave to dry.