Plastic waterstop boards are waterproofing materials made by extrusion molding of high-density polyethylene (HDPE) and polypropylene (PP) resins.

Plastic waterstop panels are primarily used in foundation projects, such as tunnels, culverts, water conveyance channels, dams, liquid storage structures, and underground facilities, where they are placed in construction joints and deformation joints during concrete pouring to form an integral part with the concrete structure. They leverage the elastic deformation properties of high polymer materials to prevent leakage and seepage at architectural joint connections, and they also feature good corrosion resistance and durability.