The plastic external sealing belt is a new type of sealing material made of polymer resin as the main raw material and extruded by special process. It forms the first sealing line of concrete structures against the water surface after welding with waterproof board. For the prevention of concrete deformation joint leakage is very important, the selection of external type waterstop should take into account and lining concrete waterproof plate welding fixed, should choose the same molecular structure of the waterproof board plastic waterstop, in recent years, the main components of domestic waterproof board for EVA,ECB,PE,HDPE and other materials, My company to a variety of different waterproof board as the carrier, on the basis of the original PVC plastic waterstop production, and has successfully developed a number of series of polymer resin waterstop, can meet the different needs of various projects, simple construction, moderate cost, is an ideal new waterproof material.