Leister GEOSTAR G7 Automatic Hot Wedge Welding Machine

The Leister GEOSTAR G7 is a 2800 W automatic hot wedge welding machine engineered for geomembrane overlap welding in civil engineering, landfill, and mine applications – featuring a 130 mm copper hot wedge for higher thermal performance than the GEOSTAR G5, welding speeds up to 12 m/min, maximum welding pressure of 1500 N, and a solid cast aluminium frame with single-handed ergonomic operation across FPO, HDPE, LDPE, LLDPE, PE, PP, and TPO geomembranes from 1 mm to 3 mm thickness.

Higher-Performance Hot Wedge Welding for Demanding Civil and Environmental Liner Installations

On large-scale geomembrane installation projects – landfill liner systems, mine tailings impoundments, and civil earthworks containment structures – the automatic hot wedge welder is the machine that determines whether the installation programme meets its schedule. At welding speeds up to 12 m/min across liner thicknesses from 1 mm to 3 mm, the difference between a machine that sustains consistent weld quality at speed and one that requires the operator to reduce travel rate to maintain thermal adequacy is measured directly in metres of installed seam per shift – and therefore in whether the liner installation supports or constrains the broader project programme.

The engineering distinction between the GEOSTAR G7 and its counterpart GEOSTAR G5 is the hot wedge length. The GEOSTAR G7’s 130 mm copper wedge – 40 mm longer than the 90 mm wedge on the GEOSTAR G5 – extends the heat transfer contact zone between the wedge surface and the geomembrane. At equivalent travel speeds, this additional contact length delivers greater thermal input per unit area of geomembrane surface, producing the noticeably higher welding performance that Leister specifies for the G7 and that civil contractors recognise in the quality and consistency of seams produced at the machine’s upper speed range. For geomembrane installation programmes across Oman and the GCC where thick liner specifications and installation productivity are both non-negotiable, the GEOSTAR G7 is the correctly specified machine.

GEOSTAR G7 Welding Performance and Civil Engineering Site Features

• 130 mm Copper Hot Wedge for Higher Thermal Performance: The 130 mm wedge length extends the heat transfer contact zone relative to the GEOSTAR G5’s 90 mm wedge, delivering greater thermal input to the geomembrane surface at equivalent travel speeds and producing the higher welding performance that thick liner specifications and maximum-speed operation require to maintain consistent fusion depth and seam integrity.
• Welding Speed up to 12 m/min: Operates across a speed range from 0.8 to 12 m/min on geomembranes from 1 mm to 3 mm thickness, sustaining productive installation output on straight panel runs while accommodating speed reduction requirements at terrain transitions, panel starts, and detail weld sections without machine reconfiguration.
• Strong Drive Motor with 1500 N Maximum Welding Pressure: The powerful drive motor maintains travel speed and clamping force consistency across the varied terrain – slopes, uneven substrate, and surface irregularity – that large civil geomembrane installations encounter, sustaining the 1500 N welding pressure required for full seam consolidation across the 2 x 15 mm dual weld seam width without speed-related pressure variation.
• Sub-One-Minute Hot Wedge Exchange: The new wedge connection system allows the 130 mm copper hot wedge to be replaced in under one minute without specialist tools, minimising machine downtime when transitioning between geomembrane material types or replacing a wedge at the end of its operational service life during active installation programmes.
• Digital Display of Welding Parameters and Supply Voltage: The onboard display presents speed, wedge temperature, welding pressure, and supply voltage during operation, giving the operator continuous process visibility and immediate indication of supply voltage variation – a practically important parameter on generator-powered remote project sites across the Gulf region where voltage stability cannot be assumed.
• Solid Cast Aluminium Frame Construction: The machine frame is cast from solid aluminium, providing the structural rigidity that maintains weld geometry and pressure consistency under the combined loading of active site operation and 18.1 kg machine weight, while enabling the maintenance-accessible design that allows cleaning, conversion, and servicing of mechanical components without extended disassembly.
• Integrated Clamping and Handle Lock for Single-Handed Operation: The clamping and handle lock mechanism secures the machine configuration with one action and allows the operator to guide the GEOSTAR G7 with a single hand during active welding – freeing the other hand for liner panel management, terrain navigation, and site communication without interrupting the weld run.
• Maximum Overlap Capacity of 150 mm: Accommodates geomembrane panel overlaps up to 150 mm, providing the seam geometry coverage required by civil containment liner specifications that mandate minimum overlap widths as a condition of weld acceptance – with the dual 15 mm seam width and test channel delivering the joint cross-section that peel and shear testing standards require.

High-Performance Geomembrane Welding Applications for the GEOSTAR G7 in Oman and the GCC

• Landfill Containment Liner Installation: Delivers the welding speed and thermal performance required for primary and secondary HDPE and FPO geomembrane liner installation in municipal solid waste and hazardous waste landfill containment systems, where the 130 mm wedge sustains specification-compliant weld quality at the machine’s upper speed range across large panel areas.
• Mine Tailings Impoundment and Heap Leach Pad Lining: Provides the drive motor power and welding pressure consistency required for geomembrane installation on the sloped liner surfaces, berm faces, and floor areas of mine tailings impoundments and heap leach pad facilities – where terrain variability and large liner areas make machine robustness and sustained performance at speed operationally decisive.
• Large-Area Water Reservoir and Hydraulic Infrastructure Lining: Welds geomembrane liners across large-area water storage reservoirs, irrigation supply infrastructure, and hydraulic containment structures in Oman and the GCC – where installation programme schedule, weld quality, and liner material coverage combine to define the technical requirements placed on the automatic welding machine.
• Thick Geomembrane Liner Installation at Maximum Speed: The 130 mm wedge thermal advantage is most operationally significant on geomembranes at the upper thickness range – from 2 mm to 3 mm – where the additional heat transfer contact length sustains the fusion quality that thick liner specification requires at speeds that would produce inadequate thermal input with a shorter wedge at equivalent travel rate.
• Multi-Material Civil Geomembrane Projects: Welds FPO, HDPE, LDPE, LLDPE, PE, PP, and TPO liner materials within a single machine configuration, enabling the GEOSTAR G7 to cover the full geomembrane material specification range encountered across the different liner zones and project stages of large civil infrastructure installations in Oman and across the Gulf region.

Leister GEOSTAR G7 – Authorised Supply and Technical Support Through iBuild in Oman

iBuild is an authorised Leister distributor in the Sultanate of Oman, providing civil engineering contractors, geomembrane installation teams, and project procurement officers with direct access to the GEOSTAR G7 alongside compatible 130 mm hot wedges, drive rollers, and the full range of Leister geo-welding accessories. As a manufacturer-authorised technical partner, iBuild provides application guidance on wedge selection, machine configuration for specific liner materials, and lifecycle support to sustain GEOSTAR G7 performance across the full duration of installation programmes – from project mobilisation through to final weld completion and handover.

For civil contractors, environmental engineers, and geomembrane installation specialists across Oman and the GCC who require the higher thermal performance of a 130 mm wedge automatic hot wedge welder on thick liner specifications and high-speed installation programmes, iBuild is the authorised local source for the Leister GEOSTAR G7 – backed by manufacturer authority, in-country technical expertise, and comprehensive lifecycle support.