PVC Water Stopper are flexible plastic strips that act as physical barriers to water at concrete joints, commonly used in basements, water-retaining structures like tanks and swimming pools, structural foundations, and other below-ground constructions. They are also known as water bars or seals for construction joints. A typical PVC water stopper features two identical halves on eithe... https://www.deesawalarubber.com/pvc-water-stoppers.html