Waterstop is " A section of flexible waterproofing material placed at any joint in concrete to prevent passage of water ". Joints in concrete structures, one side is subject to hydrostatic load, are provided with waterstops bridging the joints and embedded in concrete on either side. In concrete joints where expansion and contraction cause the joints to close and open, waterstop then are designed to accommodate itself to such movements. Flexijoint PVC Series Waterstop is extruded from specially formulated and blended high grade PVC compound. It meets local " SIRIM " standard specification and international standard and widely applied in construction industry. Flexijoint PVC " W " Series :- 150mm ~ Good application to construction joints commonly use in floors,walls and underground slabs; 200mm ~ Good application to walls and under slabs where water pressure is higher than " W " series 150mm; 250mm ~ Good application to reservoirs, dams and under tunnel. Flexijoint PVC Waterstop Application: Dams, Canals, Aquaducts, Large Reservoirs, Irrigation Projects, Bridges, Roads, Tunnels, Water Tanks, Swimming Pools, Water Filteration Plants, Sewerage Disposal System Neutralization Tanks, Basements, Foundation Floor Slabs, Retaining Walls, Effluent Treatment Plants, Thermal Power Stations, Shipyards, Docks, Cooling Towers.