PVC Water Stopper is a specially designed flexible PVC strip used to prevent water leakage through concrete joints in basements, tunnels, water tanks, and retaining walls. It provides a physical barrier at the expansion joints, construction joints, or movement joints where water would otherwise leak through. They are flexible and long-lasting in concrete, chemical-resistant, particularly in wastewater treatment and come in many profiles: dumbbell, center bulb, ribbed, etc.