PVC waterstop is manufactured from polyvinyl chloride resin combined with appropriate plasticizers, stabilizers and fillers through extrusion or calendaring. It offers favorable flexibility and plasticity, and can be produced in various widths, thicknesses and profiles, with common shapes including dumbbell, central bulb and ribbed flat types.
The material demonstrates reliable chemical stability, with sound resistance to acids, alkalis and salts typically found in groundwater and soil, maintaining sealing performance in many conventional environments. Its smooth surface and moderate density allow a tight bonding interface with concrete, effectively blocking water seepage paths.
For installation, PVC waterstop is lightweight and easy to handle and position. Joints can be homogeneously welded using hot-wedge techniques to form a continuous seal, with weld quality readily inspected and controlled. The overall installation process is relatively straightforward, helping to improve on-site efficiency.
In engineering applications, this product is primarily used for construction joints in basement slabs and walls, joints in small to medium hydraulic structures, drainage channels and open-cut tunnel lining joints under general water pressure conditions. For situations involving prolonged UV exposure or significant temperature variations, design measures such as concrete cover or other protective methods are usually adopted to maintain long-term elasticity and mechanical stability.
