RIW Waterstop is a simple yet highly effective solution for waterproofing construction joints in reinforced concrete structures. Rather than relying on a passive mechanical barrier, the sodium bentonite core swells on contact with water, generating a self-sealing pressure seal that tightens under hydrostatic load. This active swelling mechanism maintains an impermeable barrier throughout the life of the structure and accommodates minor joint movement without compromising performance. Benefits Swells on contact with water Resists 70m head of hydrostatic water pressure Simple and quick to install Replaces passive PVC/rubber waterbars — no special pieces or seam welding required Good to know Used as part of the RIW Structureseal sodium bentonite waterproofing system RIW Waterstop is not designed or intended to function as an expansion joint sealant. For construction joints within reinforced concrete basements and sub-structures
