Waterstops are important construction elements that prevent water ingress at construction joints. Contractors place these products in concrete structures to form watertight diaphragms at structural transitions where leakage is most likely to occur. Common waterstop installations are between the horizontal and vertical concrete precast components; long length wall areas, where two or more formwork setups are used to cast the structure; and cold joints that may occur during placement. Waterstops are common details on foundations, tunnels, retaining walls, water treatment facilities, bridge abutments, and slabs. These barrier materials are strategic to the long-term performance of a building envelope