A water stopper, also known as a water bar, is used in reinforced cement concrete (RCC) foundations to prevent the seepage of water through the joints or cracks in the structure. In RCC foundations, which are typically exposed to moisture, water stoppers create a waterproof barrier at construction joints, expansion joints, or any vulnerable areas where water might infiltrate. This is particularly important in areas with high water tables, or when the foundation is near a water source, as it help