Application
The Sika Waterbar® AR VN profile is installed flush with the external face of the concrete. It should be carefully fixed in the formwork before concreting. The Sika Waterbar® AR VN should be aligned and installed on the waterproofing substrate as centrally as possible to the segment joint.
Protection until the waterbar system is fully cast in the concrete.
Special care must be taken with the waterbar system ends.
Waterbars must be cleaned before casting in.
Do not install on the top surface of horizontal or slightly sloping concrete.
Welding
The Sika Waterbar® AR VN is jointed by welding at minimum ambient temperature of + 5°C and dry weather conditions.
Jointing with adhesives is not permitted.
On site welding can be undertaken using a Sika electric welding knife. The specific welding parameters must be adjusted and checked on samples prior to the welding work.
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 The welding knife is withdrawn and the Sika Waterbar® AR VN is immediately pushed together.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, over heated, dust etc.
Redo the welding if necessary.
Pre-made sections available on indent order only