Water stop with steel plate water stop rubber water-stop difference is a metal water stop, can generally be made with 2 mm ~ 2.5 mm thick sheet steel plate, welded joints should be full, without gaps, points positive side, the back surface installation. Expansion of the seal and rubber water-stop is two different sealing materials, expansion of the seal is a water-swellable adhesive strips, can be directly attached to the surface of the concrete construction joints, plugging water after volume expansion construction joints and around the pores, to achieve a reliable impermeable requirements; usually after construction joints steel stirrups or other obstacles, can not be embedded in the use of sheet metal seal and rubber water stop. Quartet strip seal appearance, its cross-sectional dimensions of 20mm × 30mm, more convenient construction. Rubber water-stop is the use of high elasticity of rubber elastic deformation under various loads, and thus play a strong seal, effectively preventing the leakage of building construction, water seepage and shock absorption cushioning effect. Generally used in casting a tape or pipe wall (plate) at the installation must pay lap waterproof construction joints or parts, generally made by a ribbed rubber sheet. In engineering structures, lower level of construction generally use steel water stop joints, vertical joints using a rubber water-stop construction joints. Sealing plates are generally used for construction joints, rubber water-pouring belt generally used for the site, water expansion of the seal used for the construction joints. When the ground water pressure is greater than 0.03mpa, ambient temperature 50 ° or less, and is not strong oxidant effect, the amount of deformation is large, it can be buried and surface water stop rubber water-stop affixed to a combination of water ways; for ambient temperature higher than 50 ° of movement joint, after copper sheet may be 2mm or 3mm thick stainless steel and other metal water stop; the erosion of local oil, oil can or plastic water stop rubber water-stop. Metal and rubber water stop both stop, metal water stop can be wall horizontal construction joints, rubber water-stop can be embedded in the wall or the bottom level of the vertical joints. Seal the water-swellable adhesive strips actual construction process design generally selective attention when choosing Rubber Sealing can withstand the highest temperature. If the large amount of water, then the metal sealing plate than the expansion of the seal easy to use, especially the large base of the valve plate.