Leister GEOSTAR G5 Automatic Hot Wedge Welding Machine

The Leister GEOSTAR G5 is a 2800 W automatic hot wedge welding machine designed for large-area geomembrane overlap welding in civil engineering applications, delivering speeds up to 12 m/min with closed-loop temperature control across FPO, HDPE, LDPE, LLDPE, PE, PP, and TPO geomembranes from 0.8 mm to 3 mm thickness – housed in a robust aluminium frame with single-handed ergonomic operation and sub-one-minute hot wedge exchange.

High-Speed Geomembrane Welding for Large-Area Civil Engineering Installations

Large-scale geomembrane installations in landfill containment, mine tailings impoundments, and water reservoir lining present a welding productivity challenge that distinguishes professional civil engineering projects from smaller-scale liner applications. When a single installation programme involves tens of thousands of square metres of geomembrane, the welding speed of the automatic machine is a direct determinant of whether the liner installation schedule supports the broader project programme – or becomes the critical path constraint that delays earthworks completion, final cover placement, and project handover.

At 12 m/min maximum welding speed across geomembrane thicknesses from 0.8 mm to 3 mm, the GEOSTAR G5 is engineered for the productivity requirements of large-area civil installations. Its closed-loop temperature control maintains wedge temperature precisely at the set point regardless of speed changes, ambient conditions, or supply voltage variation – ensuring that weld quality does not degrade as the operator pushes the machine toward its upper speed capability. The robust aluminium frame and rapid wedge exchange system ensure the machine sustains that productivity through full installation shifts without the maintenance interruptions and tool-change downtime that affect less-considered machine designs.

Engineering Performance and Site Capabilities of the Leister GEOSTAR G5

• Closed-Loop Temperature Control from 80 to 460 °C: The GEOSTAR G5 uses closed-loop technology to continuously monitor and regulate wedge temperature against the operator-set value throughout the weld run, compensating for speed changes, ambient temperature variation, and supply voltage fluctuation – maintaining the thermal consistency that weld quality requires across the full length of each panel run without manual adjustment.
• Welding Speed up to 12 m/min: Operates across a speed range from 0.8 to 12 m/min, enabling the GEOSTAR G5 to deliver maximum productive output on straight panel runs while accommodating the reduced speed requirements of detail welding, panel starts, and terrain-influenced weld segments within the same machine configuration.
• Broad Material Compatibility from 0.8 mm to 3 mm: Welds FPO, HDPE, LDPE, LLDPE, PE, PP, and TPO geomembranes across material thicknesses from 0.8 mm to 3 mm, enabling a single machine deployment to cover the full material specification range of civil containment projects where different liner zones may require different geomembrane grades and thicknesses.
• Sub-One-Minute Hot Wedge Exchange: The 90 mm copper hot wedge can be changed in under one minute without specialist tools, minimising machine downtime when transitioning between material types or replacing a wedge at the end of its service life – maintaining installation programme momentum during active liner placement.
• Maximum Welding Pressure of 1500 N: Applies up to 1500 N of controlled clamping pressure through steel sharp diagonal drive rollers, ensuring full consolidation of the weld seam across the 2 x 15 mm dual seam width and up to 150 mm overlap – producing the weld cross-section and bond integrity that containment liner specifications require.
• Integrated Clamp and Handle Lock for Single-Handed Operation: The clamp and handle lock mechanism allows the operator to guide and control the GEOSTAR G5 with one hand during active welding, freeing the other hand for liner management, panel alignment, and terrain navigation – reducing the operator count per machine and improving site logistics on large installation programmes.
• Robust Aluminium Frame Construction: The machine frame is manufactured from aluminium to provide the structural rigidity required to maintain weld geometry and pressure consistency under the loading of 16.8 kg in active site operation, while resisting the corrosion and surface degradation that steel frames accumulate in geomembrane installation environments involving soil contact, liner chemicals, and outdoor exposure.
• Intuitive Digital Display: The onboard display presents operating parameters including speed and wedge temperature in a format accessible to operators at the pace of active welding, supporting process verification and parameter adjustment without interrupting machine travel.

Geomembrane Welding Applications for the GEOSTAR G5 in Civil and Environmental Engineering

• Landfill and Mine Containment Liner Installation: Delivers the welding speed and material range coverage required for primary and secondary geomembrane liner installation in municipal solid waste landfills, hazardous waste containment cells, and mine tailings impoundment facilities where liner integrity and installation programme schedule are both contractually critical.
• Water Reservoir and Canal Lining: Welds large-area geomembrane liners for potable water storage reservoirs, irrigation supply canals, and treated water retention structures across Oman and the GCC – where installation speed, seam quality, and weld continuity across full panel lengths determine the hydraulic performance of the completed liner system.
• Multi-Material Geomembrane Projects: The GEOSTAR G5’s compatibility with seven geomembrane material types enables deployment across project zones specifying different liner materials – HDPE primary liner, TPO or FPO secondary layers, PVC-P or CSPE detail areas – without requiring multiple automatic welding machines on the same project site.
• Aquaculture Pond and Irrigation Infrastructure: Supports the installation of geomembrane liners in aquaculture production ponds, irrigation reservoir lining programmes, and water management infrastructure projects across the Gulf region, where large panel areas and extended liner runs make automatic welding machine speed and reliability operationally decisive.
• Steep Slope and Berm Face Liner Welding: The single-handed operation capability and aluminium frame construction allow the GEOSTAR G5 to be guided on embankment slopes and berm faces where liner panel runs follow contoured terrain – maintaining weld quality across terrain changes that require operator engagement with the machine guidance throughout the weld run.

Leister GEOSTAR G5 – 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 specialists, and project procurement teams with direct access to the GEOSTAR G5 alongside compatible hot wedges, drive rollers, and the full range of Leister geo-welding accessories. As a manufacturer-authorised technical partner, iBuild supports machine configuration for specific geomembrane material grades, wedge selection guidance, and lifecycle support to ensure the GEOSTAR G5 sustains performance across the full duration of the installation programme.

For civil contractors, environmental engineers, and liner installation teams operating across Oman and the GCC on projects where geomembrane welding speed, material versatility, and machine reliability are programme-critical requirements, iBuild is the authorised local source for the Leister GEOSTAR G5 – backed by manufacturer authority, in-country technical expertise, and comprehensive lifecycle support.