Drylok 4lb Fast Plug Hydraulic Cement

A fast-setting hydraulic cement used to stop the flow of water, even under pressure, through cracks and holes in masonry surfaces. Sets in 5 minutes.Use to patch interior or exterior mortar joints, cracks and holes in masonry walls above or below grade,sealing leaks around concrete pipes and drains, chimneys, swimming pools and water fountainsWithstands up to 3,050 lb. of hydrostatic pressureSets within 3 - 5 minutes to stop active water leaksInterior and Exterior use, no topcoat requiredExpands as it dries to lock in place