Water Stops are flexible solid and hard rubber strips which provide a physical barrier to Water at concrete joints, mostly in basements, Water retaining structures like Water tanks, Swimming pools, structural foundations & other below ground level constructions. Waterstops are also termed as Water Bars, seals construction joints. A typical waterstops have two identical half on both side of a central bulb. These additional extensions are provided with the aim of increasing path length for water entering behind the edge of water stop.