Sika Waterbar® O VN
Flexible PVC waterstop
Sika Waterbar® O VN are constructed from flexible thermoplastic PVC. They are designed to stop the migration of water through construction and expansion joints in concrete structures. Sika Waterbar® O VN are available in various sizes and profiles to suit all types of application.
- Sealing starts as soon as the concrete has hardened
- Multi rib profile provides impenetrable barriers to water migration
- Can be easily site welded
- Good chemical resistance
- Available various kind of profiles for all type of application
Usage
For the effective sealing of concrete construction and expansion joints in structures such as:- Basements
- Water reservoirs
- Sewage treatment plants
- Swimming pools
- 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
- Good chemical resistance
- Available various kind of profiles for all type of application
Packaging
Roll length:
Sika Waterbar® O VN 15 = 20m
Sika Waterbar® O VN 20 = 20m
Sika Waterbar® O VN 25 = 20m
Sika Waterbar® O VN 32 = 15m
Colour
Flexible strip / Yellow
Product Details
APPROVALS / STANDARDS
Test Report 21LM031601
General Spec. for Civil Engineering Works 2006: Table 16.14 GMWS 20.5.13 Table 20.7
Shelf Life
5 years from date of production if stored properly.
Storage Conditions
Dry, shaded place (protected from sunlight)
System Structure
| Type | Width (mm) | Roll Length (m) | Nominal Thickness (mm) (±10%) |
| O-15 | 150 | 20 | 3.0 - 4.5 |
| O-20 | 200 | 20 | 3.0 - 4.5 |
| O-25 | 250 | 20 | 3.0 - 4.5 |
| O-32 | 320 | 15 | 3.0 - 8.0 |
Sika Waterbar® O VN profile
Shore A Hardness
| 82 | ASTM D2240 |
Tensile Strength
| 13.80 N/mm2 | BS 2782: Pt 3: Method 320A to 320F |
Elongation
| 306% | BS 2782: Pt 3: Method 320A to 320F |
Service Temperature
-35°C to +55°C
Chemical Resistance
Permanent: Seawater, sewage.
Temporary: Diluted inorganic alkalis, mineral acids, mineral oils and fuels
Application
APPLICATION INSTRUCTIONS
Fixing to formwork
Sika Waterbar® O VN may also be used to in conjunction with split formwork. However care should be taken to ensure that the “O” ring is not squashed flat between two forms. This method of installation increases the capacity of the Sika Waterbar® O VN to accommodate expansion.
Fixing 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
Sika Waterbar® O 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® O 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 Sika Waterbar® O VN.
Placing concrete second stage
Removal of formwork in the neighborhood of Sika Waterbar® O VN must be done with care.
The end of the Sika Waterbar® O VN should be thoroughly checked for honey-combing 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 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® O 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.
Failures can be caused by irregularities of cut edges, insufficient heat, dust etc.