RYOT4 SWELLEABLE BAR is an active sodium betonies/butyl rubber based Swell able water stop bar designed to stop water infiltration through the cast in place concrete construction joints by expanding upon contact with water to form a positive seal against the concrete. Usage Areas:Used for concrete joints, and intersections of old and new concrete in the construction of pools, foundations, tunnels, manholes, retaining walls, garages, curtain walls, water deposits