Sika Waterbar® V VN
Sika Waterbar® V VN is constructed from flexible thermoplastic PVC.
It is designed to stop the migration of water through construction joints in concrete structures.
- Sealing starts as soon as the concrete has hardened
- Multi rib profile provides impenetrable barriers to water migration
- Can be easily site welded - (welding knife is available)
- Good chemical resistance
- Available various kind of profiles for all of type application
Usage
For the effective sealing of concrete construction joints in structures such as:- Water reservoirs
- Sewage treatment plants
- Swimming pools
- Basements
- Retaining walls
- Lift shafts
- Tunnels, culverts
- Service pits
Advantages
- Sealing starts as soon as the concrete has hardened
- Multi rib profile provides impenetrable barriers to water migration
- Can be easily site welded - (welding knife is available)
- Good chemical resistance
- Available various kind of profiles for all of type application
Packaging
20 m roll (other lengths on request)
Colour
Flexible strip / yellow
Product Details
Composition
Polyvinyl chloride
Shelf Life
5 years from date of production if stored properly
Storage Conditions
Dry, shaded place (protected from sunlight)
System Structure
| Type | Width (±5 mm) | Roll length | Nominal thickness (±10 %) |
| V-15 | 150 mm | 20 m | 3.0–5.0 mm |
| V-20 | 200 mm | 20 m | 3.0–5.0 mm |
| V-25 | 250 mm | 20 m | 3.0–5.0 mm |
| V-32 | 320 mm | 15 m | 3.0–7.0 mm |
Sika Waterbar® V VN profile
Shore A Hardness
| > 70 | (ASTM D2240) |
Tensile Strength
| 12 N/mm (±5 %) | (ASTM D412-06) |
Elongation
| 300 % (±5 %) | (ASTM D412-06) |
Service Temperature
-35 °C min. / +55 °C max.
Chemical Resistance
Permanent: Seawater, sewage
Temporary: Diluted inorganic alkalis, mineral acids, mineral oils and fuels.
Application
APPLICATION INSTRUCTIONS
Fixing to formwork
The “V” profile Sika Waterbar® V VN is fitted into the split formwork or shuttering for casting centrally into the stopends. It is used for construction joints and movement joints where nominal movement is anticipated, such as basement or retaining walls.
Fixing to reinforcement
Pre-punched eyelets are located in the outer flanges of the profiles. These simplify the fixing of waterbars to the steel reinforcement with tie wires to ensure the waterbars are not displaced during concreting.
Placing concrete first stage
The Sika Waterbar® V VN performs its function only if both sides are well embedded in the concrete. Avoid formation of honey combs by vibrating carefully.
The consistency of the concrete itself should be neither too plastic nor too stiff, and the aggregate must be well graded.
Placing of fresh concrete near the Sika Waterbar® V VN requires care, as otherwise it will be forced from its position by the pressure of the fresh
concrete, i.e. the ends will fold up. To prevent this, the same concrete pressure must be present on both sides of the Waterbar.
Placing concrete second stage
Removal of formwork in the neighborhood of Sika Waterbar® V VN must be done with care.
The end of the Sika Waterbar® V VN should be thoroughly checked for honeycombing on the stop-end and repaired if necessary. It must also be
cleaned of all hardened concrete remnants adhering from the first concrete stage. Further procedure is similar to the first stage.
Welding
On site welding can be undertaken using a Sika electric welding knife. Both ends of the joint are heated simultaneously on the faces of the
welding knife until an even, molten bead of PVC appears. The welding knife is withdrawn and the Sika Waterbar® V VN are immediately pushed
together. The joint should be held rigid until the plastic cools down and solidifies.
Check for any gaps or imperfect joints. Redo the welding if necessary.
Failures can be caused by irregularities of cut edges, insufficient heat, dust etc.