Hot wedge welders, hand extrusion welders, hot air guns and seam testing kit for HDPE liner installation. Held in stock in Dubai, shipped to lining contractors across the Gulf, Africa and Asia.
A geomembrane liner is only as good as its joints. The sheet itself is tested and certified before it ever reaches site, but the seams are made in the field, in heat, dust and wind, by a crew working to a fixed programme. That is where projects are won or lost, and it is the reason we supply welding plant rather than liner alone.
We supply and service the full set of thermoplastic welding equipment used on geomembrane installations: automatic hot wedge welders for production seams, hand extrusion welders for patches and detail, hot air welders for tacking and thin material, extrusion welding rod, and the air pressure and vacuum testing kit that proves the work. We are a supplier and dealer, not a manufacturer, which means we can put the right machine in front of you rather than the only one we make.
Machines are stocked in Dubai and dispatched worldwide. Contractors in the UAE can collect the same day. For projects abroad we handle the export paperwork, match the machine voltage to the destination, and can consolidate equipment with a geomembrane sheet order in one shipment.
Three welding processes cover every seam type on a liner installation, plus the consumables and test equipment that go with them.
The IZ-900 automatic hot wedge welder produces the long production seams. Self-propelled, with dual digital control of temperature and speed, and a dual track weld that leaves a sealed channel for air pressure testing.
The hand extrusion welder used for patches, repairs, pipe penetrations and every corner a wedge welder cannot reach. Feeds 3 mm or 4 mm HDPE rod and lays a fillet bead over the sheet edge.
The IZ-1600. For tacking liner in position, welding PVC and tarpaulin, and preheating before extrusion work. 1600 W, 180 L/min, 1.05 kg. The cheapest and most used item on a lining crew's plant list.
4 mm HDPE welding rod in black, blue, white and green, plus LDPE, PP and PVC. Using rod of the wrong grade, or the wrong colour on an exposed liner, is a common reason a repair fails.
Air pressure test kit with a dual scale psi and kPa gauge, hose and insertion needle for dual track seams. Vacuum boxes, spark testers and tensiometers to order. The kit that turns a finished weld into a documented one.
Heating elements, carbon brushes, welding boots, nozzles, fuses and drive parts for the IZ-900, IZ-620 and IZ-1600. Held in Dubai so a worn part does not stand a crew down for weeks.
We also supply four machines from Weldy, the Leister group value line. The WGW 300 welds HDPE from 0.8 mm, which the IZ-900 cannot, so it is the wedge welder for farm pond and aquaculture liner. The booster EX3 is the extruder Weldy built for geomembrane. The booster EX2 is its compact stablemate, and the HT1600 is a 700 degree hot air gun with a ceramic element.
Buyers on brand-specified projects choose Weldy. Buyers on price choose the IZ range. Both ship from the same warehouse, and mixed orders are normal. Compare the two ranges.
| Machine | Summary |
|---|---|
| Weldy WGW 300 | Wedge welder, 0.8 to 2.5 mm HDPE, 0 to 8.5 m/min, 15 kg |
| Weldy booster EX3 | Extruder, 3.4 kg/h, rated for geomembrane, 6.9 kg |
| Weldy booster EX2 | Extruder, 2.5 kg/h, tanks and fabrication, 6.4 kg |
| Weldy HT1600 | Hot air gun, 40 to 700°C, 240 L/min, 1.0 kg |
The same three processes appear on every containment project, at different scales.
Base liners and capping systems carry the tightest seam specifications of any application, with destructive peel and shear testing at set intervals along every run. A dual track wedge weld with a continuous air test record is normally mandatory, and extrusion work is limited to patches and penetrations that are individually vacuum tested.
Agricultural and municipal water storage in the Gulf is almost entirely HDPE lined because of evaporation loss and ground salinity. Panels are welded in place with a wedge machine and the anchor trench detail, inlet pipes and any ladder penetrations are finished with a hand extrusion welder.
Long, narrow geometry favours the wedge welder: seams run parallel to the channel and the machine tracks continuously for hundreds of metres. Extrusion work concentrates at the transitions, structures and repairs where the liner meets concrete.
Leach pads combine thick liner, aggressive chemistry and heavy loading, so 2.0 mm and 2.5 mm sheet is common and welding parameters have to be reset for the gauge. Both processes are used under a full construction quality assurance regime.
Bund lining involves short seams, many corners and dense pipework, which shifts the balance towards extrusion and hot air work. A small wedge welder still handles the floor panels, but detail dominates the programme.
PVC coated fabric, banner material and single ply roofing all weld with hot air rather than a wedge, at lower temperature and with different nozzles. The same hot air gun that tacks a geomembrane will do this work with a nozzle change.
Most geomembrane welding equipment is built in Europe or in China, and most buyers in this region are quoted ex works from one or the other. That price looks attractive until freight, duty, a voltage mismatch and a six week lead time land on top of it. Buying from a Dubai stockist removes those variables.
We hold machines locally, quote a delivered figure rather than an ex works one, supply units configured for the voltage and plug type of your destination, and keep wear parts on the shelf so a heating element or a drive roller does not stop a crew for a fortnight. For contractors in the Emirates that means same day collection from Dubai. For buyers in Africa and South Asia it means one supplier handling the machine, the consumables and the export documentation together.
More about how we work and who we supply.
| Item | Detail |
|---|---|
| Stock location | Dubai, United Arab Emirates |
| Supply basis | Supplier and dealer, multi-brand |
| Voltage options | 220-240V and 110-120V, destination specific |
| Freight | Air freight or sea freight, DAP or CIF |
| Export documents | Commercial invoice, packing list, certificate of origin |
| Consolidation | Machines shippable with geomembrane sheet orders |
| Wear parts | Heating elements, rollers, nozzles, PTFE held in stock |
| Languages | English and Arabic |
The questions buyers ask most often before placing an order for welding plant.
A geomembrane welding machine joins overlapping sheets of thermoplastic liner into a continuous, watertight seam. The most common type is an automatic hot wedge welder: a heated metal wedge melts the facing surfaces of the overlap from the inside while two drive rollers press the molten layers together, and the machine self-propels along the seam at a set speed. Hand extrusion welders and hot air guns handle the detail work that a wedge welder cannot reach, such as patches, pipe penetrations and corners. All three work on HDPE, LLDPE, PVC and similar thermoplastics, and none of them use filler rod the way metal arc welding does.
A geomembrane is an impermeable plastic sheet used as a barrier to stop liquid or gas moving through soil. Typical uses are landfill base and capping systems, water reservoirs and farm ponds, canal and channel lining, mine leach pads and tailings dams, effluent lagoons, tank and secondary containment bunds, and decorative lakes. Because the sheet only performs as well as its joints, every one of those applications depends on welded seams rather than glued or mechanically fastened ones, which is why a welding machine is core plant on any lining job. We also supply the HDPE liner sheet itself alongside the equipment.
Thermoplastic lining uses three machine types, and most crews carry all three. The automatic hot wedge welder produces the long production seams and is the only one that creates a dual track with a test channel between the welds. The hand extrusion welder adds molten filler along an edge or over a patch, and is used for repairs, detail work and anywhere the wedge welder cannot run. The hot air welder or hot air gun tacks sheets in position before the main weld and joins thin materials such as PVC and tarpaulin. Note that MIG, TIG and MMA are metal arc processes and have no role in geomembrane work.
Price depends far more on the machine type than on the brand. A hot air gun with a nozzle set is the cheapest item on a lining crew's plant list, a hand extrusion welder sits in the middle, and an automatic hot wedge welder with digital temperature and speed control is the largest single purchase. Duty, shipping and the accessory package change the landed figure considerably, so a machine quoted ex works is not comparable with one quoted delivered to your site. Send the machine type and your destination and we will quote a delivered price rather than an ex works one, so the figure you compare is the figure you pay.
A wedge welder melts only the existing sheet material and fuses it under roller pressure, so it adds nothing to the joint and produces a flat, uniform seam at high speed. An extrusion welder adds new molten HDPE from a filler rod, building a fillet bead over the edge of the overlap. Wedge welding is faster, more consistent and testable by air pressure, which is why specifications call for it on all primary seams. Extrusion welding is slower and more operator dependent, but it is the only option for patches, repairs, tight corners and detail around pipe boots. A lining specification will normally require both processes on the same project.
A crew equipped to complete a project without waiting on hired plant carries three machines and two consumables. An automatic wedge welder for the production seams, a hand extruder for patches and detail, and a hot air gun for tacking. Alongside those, a working supply of welding rod in the correct grade and the test kit the specification calls for. Crews that arrive with a wedge welder alone reach the first pipe penetration and stop.
Yes. We ship from Dubai to the Gulf, East and Southern Africa, the Indian subcontinent and Southeast Asia, by air freight for single machines and by sea for larger consignments together with liner material. Machines are supplied with the voltage and plug configuration for the destination country, and we prepare the commercial invoice, packing list and certificate of origin needed for customs clearance. See export and shipping for lead times and documentation.
Seam quality is normally assessed against ASTM D6392, which sets out the peel and shear test methods for thermoplastic geomembrane seams, alongside the GRI GM19 specification for seam strength values. Non-destructive testing is covered by ASTM D5820 for air pressure testing of dual track wedge seams and ASTM D5641 for vacuum box testing of extrusion seams. Every machine we supply is capable of meeting those requirements when set up correctly, and the seam testing equipment to demonstrate compliance is available from the same source.
Send the liner thickness, the total seam length and the country the machine is going to. We will tell you which process the specification needs and quote it delivered.