A waterstop is a crucial element used in concrete structures to prevent the infiltration of liquids, especially water, at joints and seams. Various materials are employed in the production of waterstops, and the choice of waterstop material depends on the specific requirements of each structure. Waterstops function by extending the path of water or other fluids, preventing them from penetrating. Key quality attributes for waterstops include elongation percentage, tensile strength, and hardness, all of which must meet structural standards. Additionally, the durability of waterstops in various conditions, including alkaline environments, is of utmost importance.