HOYLAKE Tech-Stop PVC Waterstops lead the way in high technology waterstops and comply to international standards. Tech-Stop PVC Waterstops are extruded from specially compounded PVC. They are designed for use in water retaining and water excluding structures where a positive seal is required for poured in-situ concrete expansion, construction and contraction joints. The range of profiles for both centrally and externally placed applications when embedded into the concrete, form a continuous barrier making Tech-Stop PVC Waterstops ideal for preventing water penetration. These profiles are available in rolls with separate intersections supplied to simplify and minimise on-site fabrication. Concrete structures are only as watertight as the waterstops that join them. Tech-Stop Waterstops are designed to allow for expansion, contraction and other movements that can cause joints to open and close. The efficiency of any waterstop is very dependent on good workmanship and on full compaction of the surrounding concrete. Optimum performance will be achieved if the waterstop is installed by keeping these factors in mind.