DAP Quick Plug Hydraulic & Anchoring Cement is a versatile, high-performance patching compound, formulated to stop running water through deep cracks, holes and imperfections in concrete surfaces. When used properly, it creates a watertight seal in just 3 to 5 minutes. DAP hydraulic cement works both above and below grade. It can also be used to anchor machinery and other fixtures into masonry and concrete surfaces. Hydraulic and anchoring cement works for interior and exterior use.