Internal and external construction joints


Polystop CJ is Poly Vinyl Chloride (PVC) resin extrusions waterstop that are plasticized and stabilized to offer good performance in concrete structures against water leakages. Polystop CJ is manufactured to meet the most stringent performance specifications and are resistant to abrasion and chemicals. 


Good tensile strength & elongation Brass eyelets on edge flanges for tying with steel reinforcements Non toxic. Suitable for use in contact withpotable water Good chemical resistance Non-staining. Will not discolor concrete or produce electrolytic action.

This TDS is applicable for the United Arab Emirates only. Please contact your local Polybit sales office for the available TDS in your region

Step by Step


Internal and centrally placed waterstops are positioned within the concrete where the centerline of the waterstop is aligned with the centre of the joint. Such waterstops functions as a watertight diaphragm wall against any water leakage. For a proper placement of the waterstop, split formwork is recommended when installing in slab-toslab, slab-to-wall and wall-to-wall joints. The waterstop is then tied with wires trough the eyelets provided at the end flanges to the reinforcement. This will ensure that the waterstop firmly held in position and is not misaligned or fold during the concrete pour. One half of the waterstop has to be positioned within the first pour and the other half projecting into the second pour. A tight fit between the waterstop and the form is also necessary to prevent excessive leakage of concrete paste, which could lead to honeycombing of the concrete. A fully continuous water stop network must be formed throughout. At bends and additional joints, factory welded junctions are to be used when jointing with the placed water stops. Field buttsplices shall be heat fused welded using a teflon coated thermostatically controlled welding iron (240V).The edge of the water stop shall be cut with a knife to get an even and sharp finish and aligned in a specially designed fixing jig. The edges will then be positioned in the jig in such a fashion that at least 25mm of water stop protrudes from the jig. Place the welding knife in between the two ends, and when the PVC starts melting (>140°C), beads will start forming around the section. Remove the welding knife and press both the ends firmly against each other to form a neat buttsplice. Press the joints against each other for sometime till the PVC cools and forms a strong fusion welded joint.