PVC made swellable water stop is used during waterproofing of concrete joints. This water stop is placed across the concrete joints prior to pouring of concrete to form a protective barrier to avoid water infiltration to avoid passing of penetrated water through the joints. This polyvinyl water stop is especially recommended when concrete structure is developed in two phases like slab and wall or slab and slab or wall and wall. Available in black color, this PVC swellable water stop is preferred over commonly used water stops for its affordable cost.