PVC Water Stopper Seals

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Water Stops are flexible Plastic strips which provide a physical barrier to Water at concrete joints, mostly in basements, Water retaining structures like Water tanks, Swimming pools, structural foundations & other below ground level constructions.  A typical water stop have two identical half’s on both side of a central bulb. These additional extensions are provided with the aim of increasing path length for water entering behind the edge of water stop. 

Compounding of Water Stops:

Waterstoppers are manufactured from Anti-Ageing customized plastic compound with PVC as a base polymer and exhibiting required properties like High Elasticity & Tensile Strength, Immune to Corrosion, Excellent weather resistant, Unaffected by acids, alkalis, metals salts and other chemicals, Lower water absorption, Withstand high Hydro static pressure, Can bear shocks of heavy turbines, Earth quakes, Floods.

Application in construction Industry

PVC  Waterstops acts as sealants at RCC Masonry concrete joints & prevent any seepage of water in or out though joints. 

Water stoppers withstand expansion or contraction movement at joints and take care of any deflection or displacement arising due to change in temperature, differential settlement of foundation, Geo disturbances causing Seismic forces like earth quack, thus eliminating danger of cracks.

Selection criteria:

Selection of the waterstop depends upon the hydro-static pressure of safe passage of seepage water where substantial expansion/contraction of joint takes place.

• The overall width of the water stop should not be greater than the thickness of the concrete.
• The distance form the face of the concrete to the waterstop must not be less than half the width of the watestop.
• The width of the water stop must be at-least 6 times the largest aggregate used for satisfactory compaction.

Types :

1. Ribbed Type- multipurpose design, used where differential settlement of poured concrete is expected and a firm grip in concrete is desired.
2. Dumbbell Type- Greater variation in temperature causes expansion or contraction of joints, Dumbbell type waterstops  is suggested for these sites.
3. Kicker (Surface) Type: these are externally placed and are use where embedded types can not be used due to interference of steel reinforcement.

Waterstop installation procedure:

Water Stopper is tied to steel frame works or small eyelet by means of small wires (same being depicted in the adjacent figure), certain metal clamps meant to grip the water stop seal and keep it in proper position.

Firstly one half of the waterstop is embedded in the concrete leaving the second half extended. Second half is also embedded leaving the center bulb free for expansion and contraction movements.

Area of Application:

• Public Utilities : Bridges, Road Embankments, Tunnels, Water Tanks, Swimming Pools, Water Filtration plants, Sewage Plants, Dams, Canals, Aqueducts, Reservoirs, Irrigation Projects Cooling Towers.
• Building: Basements, Foundations Slabs, Masonry Joints, Terraces, Retaining Walls, Overhead & Underground Water Tanks, Skyscraper.
• Industries: Chemical Plants, Fertilizer Steel, Waste Treatment Plants, Thermal & Hydro Power Stations, Atomic Reactors, Shipyards & Docks.

Precautions taken during water stop installation

• They are vulnerable to get damaged during construction.
• Compaction of concrete around waterbar should be taken care otherwise it can dislocate & could lead to a risk of honeycomb formation which may lead to leakage through concrete itself rather then through joint. pvc water stopper water bar.