Ribbed Centerbulb Rubber Waterstop Roll

This is a heavy-duty, commercial-grade black rubber waterstop roll featuring a ribbed profile and a hollow centerbulb. Designed to be embedded directly across concrete joints during pouring, it creates a continuous, watertight diaphragm. The ribbed outer flanges lock tightly into the curing concrete, while the flexible center bulb deforms to absorb structural movements (expansion, contraction, and lateral shear) without tearing or losing its seal.

The primary purpose of a ribbed centerbulb waterstop is to waterproof joints in concrete structures (such as foundations, basements, water treatment tanks, dams, and tunnels). It is cast directly into the concrete across joint lines to prevent water or liquid chemicals from migrating through, while the center bulb allows the joint to safely move and settle over time.

Strip Width: Approx. 6 inches to 9 inches (standard waterstop width).

Roll Outer Diameter: Approx. 15 inches.