Zinsser Watertite 05074 Hydraulic Cement, Gray, Solid, 2.5 lb, Carton

Permanently stop the active flow of water with RUST-OLEUM Zinsser WATERTITE hydraulic cement for concrete and masonry. This powerful formula adheres to wet surfaces and expands as it dries to fill deep cracks and holes, creating a watertight seal in just 5