Concrete Crack Repair (No. 8650-69) is a rapid curing, two-part hybrid polyurethane crack repair in a single cartridge. The specially formulated self-leveling, low viscosity (water-like) material penetrates deep into cracks for a superior bond that can be opened to traffic in one hour at 77 'F (25 'C). Concrete Crack Repair is suitable for repairs from hairline up to 1 in (25 mm). Use for: Driveways, Warehouse Floors, Garage Floors, Bridge Decks, Basement Floors, Sidewalks.