Rapid Patch Self-Leveling Resurfacer is a cement-based product for resurfacing concrete floors with damaged finishes or as a wear surface for light industrial floors where a hard, flat smooth surface and a quick return to service is desired. Also use as an underlayment for installation of ceramic tile, stone, resilient flooring, carpet, or other finished flooring. Typical substrates include: fully cured concrete, APA rated exterior grade/exposure 1 plywood or OSB underlayment grade equivalent with expanded wire lath reinforcement. Install from feather edge to 2 in. (50 mm) thick.