Leister TWINNY T5 Automatic Geomembrane Welding Machine

The Leister TWINNY T5 is a 3450 W automatic combi-wedge geomembrane welding machine operating at speeds from 0.8 to 8 m/min – approximately 50% faster than the TWINNY T – with a long stainless steel combi-wedge, digital display of speed and temperature, mechanical overpressure protection, Field-Kit large travel rollers for uneven terrain, and 1000 N maximum welding pressure across CSPE, EPDM, FPO, HDPE, LDPE, LLDPE, PP, PVC, and TPO geomembranes from 0.3 mm to 3 mm thickness – designed for pond construction, fish farm lining, mine containment, and landfill liner installation.

High-Speed Geomembrane Welding for Pond, Mine, and Landfill Liner Installation

Geomembrane liner installation on fish farm ponds, aquaculture facilities, mine containment structures, and landfill liner systems combines large installation areas with the terrain variability that active civil project sites present – irregular substrate surfaces, sloped embankment sections, and the coarse aggregate ground conditions that standard indoor-kit travel rollers cannot navigate without machine instability or seam quality compromise. The productivity requirement is clear: on a large-area liner installation, the welding speed of the automatic machine is the primary determinant of installation programme duration, and a significant speed improvement over the predecessor machine directly reduces the number of machine-hours and operator-hours that the programme requires.

The TWINNY T5 delivers that improvement. Its approximately 50% speed increase over the TWINNY T results from a more powerful blower, significantly higher heating output at 3450 W, and an optimised combi-wedge system that maintains seam quality at the higher travel speeds the upgraded drive system achieves. The Field-Kit large travel rollers provide the ground clearance needed on the rough substrate surfaces of active pond construction, mine site liner installation, and landfill cell preparation – where the ground conditions that follow earthworks completion are rarely the even, prepared surfaces that indoor-kit rollers are designed for. For geomembrane installation contractors and civil engineers across Oman and the GCC working on liner programmes where welding productivity and site adaptability determine project outcome, the TWINNY T5 delivers the performance advance the application requires.

TWINNY T5 Welding Performance and Civil Site Application Features

• Approximately 50% Higher Welding Speed than TWINNY T: The combined effect of a more powerful blower and 3450 W heating output enables the TWINNY T5 to achieve welding speeds up to 8 m/min – approximately 50% faster than the predecessor TWINNY T automatic welder. On large liner installation programmes where total seam length extends to thousands of metres, this speed advantage directly reduces machine-hours, operator-hours, and programme duration in proportion to the welding length completed per shift.
• Long Combi-Wedge Technology for Membranes from 1.5 mm and Above: The combi-wedge system combines hot wedge contact and hot air delivery in a single long stainless steel welding element – the long wedge version configured for geomembrane thicknesses from 1.5 mm and above. This dual-mode heat transfer approach provides consistent thermal input to both faces of the overlap seam simultaneously, producing the fusion depth and seam uniformity required for structural and containment performance on pond, mine, and landfill liner applications.
• 3450 W Heating Power with Temperature Range from 100 to 560 °C: The 3450 W heating system sustains the thermal output required for productive welding at speeds up to 8 m/min on HDPE and PP membranes at the upper thickness range – where the combination of high travel speed and thick membrane section demands more thermal input per unit time than lower-powered machines can provide while maintaining seam quality.
• Digital Display of Speed and Temperature: The onboard digital display presents both welding speed and temperature simultaneously during operation, giving the operator real-time visibility of both primary process parameters without requiring separate instruments or interrupting the weld run to check settings – supporting the process monitoring that professional geomembrane welding quality assurance requires on every installation.
• Mechanical Overpressure Protection: The mechanical overpressure protection system prevents welding pressure from exceeding the machine’s rated capacity in the event of membrane bunching, substrate irregularity, or machine guidance error – protecting both the seam integrity and the machine’s drive and pressure mechanism from the forces that uncontrolled pressure spikes can impose during active site welding.
• Field-Kit Large Travel Rollers for Uneven Terrain: The Field-Kit large travel rollers provide increased ground clearance compared to indoor-kit rollers, enabling the TWINNY T5 to maintain stable, consistent machine travel across the rough, irregular, and aggregate-covered ground surfaces that follow earthworks completion on pond construction sites, mine liner preparation areas, and landfill cell base preparation – where ground conditions after earthworks are rarely compatible with standard roller configurations.
• 1000 N Maximum Welding Pressure with 125 mm Overlap Capacity: The TWINNY T5 applies up to 1000 N of welding pressure through steel blunt diagonal drive rollers across seam overlaps up to 125 mm, producing the consolidation force required for fully fused, structurally adequate seams on HDPE and other geomembrane materials in the 1.5 mm to 3 mm thickness range that pond and mine liner applications commonly specify.
• Nine Material Compatibility Types from 0.3 mm to 3 mm: Welds CSPE, EPDM, FPO, HDPE, LDPE, LLDPE, PP, PVC, and TPO geomembranes from 0.3 mm to 3 mm – covering the full range of membrane materials and thicknesses encountered in pond construction, fish farm lining, mine containment, landfill liner installation, and civil environmental projects across Oman and the GCC within a single machine configuration.
• Maintenance-Friendly Powerful Drive Design: The powerfully designed drive system is engineered for low maintenance requirements – reducing the service interventions and unplanned maintenance downtime that less robust drive systems impose on installation programmes where the automatic welder must sustain productive operation across multiple continuous shifts of large-area liner installation without equipment downtime interrupting the installation schedule.
• Well-Positioned Handles for Guidance, Movement, and Transport: The handle positions are optimised for guiding the machine along the weld line during active welding, lifting and repositioning the machine at panel starts and ends, and carrying the TWINNY T5 between work positions across the liner installation area – reducing operator effort and improving machine control at each of the repeated handling actions that large-area geomembrane installation requires throughout the working shift.

Geomembrane Welding Applications for the Leister TWINNY T5 in Oman and the GCC

• Pond Construction and Aquaculture Facility Liner Installation: Welds geomembrane liners for fish farming ponds, aquaculture production facilities, and irrigation storage ponds across Oman and the GCC – where large liner areas, sloped embankment sections, and the post-earthworks ground conditions of active pond construction sites require the Field-Kit ground clearance and 8 m/min welding speed of the TWINNY T5 for productive, high-quality liner installation within project programme constraints.
• Mine Containment Liner and Heap Leach Pad Installation: Provides the welding speed, material range, and terrain adaptability required for geomembrane liner installation on mine tailings containment pads, heap leach facilities, and process chemical containment structures – where liner area, ground conditions, and material specifications combine to make automatic welding machine productivity and site adaptability the key determinants of installation programme success.
• Landfill Cell Liner Installation: Delivers the productive welding speed and seam quality required for primary and secondary geomembrane liner installation in landfill containment cells – where the combination of large liner areas, cell preparation ground conditions, and the quality assurance requirements of environmental regulatory compliance make a high-speed, mechanically protected, display-equipped automatic welder the appropriate machine selection.
• Civil Reservoir and Water Retention Liner Programmes: Welds geomembrane liners on civil water storage reservoirs, irrigation infrastructure, and water retention structures across Oman and the GCC – where the liner area and installation schedule requirements of water authority and civil infrastructure projects benefit from the 50% speed improvement of the TWINNY T5 over predecessor machines in reducing total liner installation programme duration.
• Multi-Material Geomembrane Installation Programmes: The nine-material compatibility and 0.3 mm to 3 mm thickness range of the TWINNY T5 enable a single machine to serve liner programmes where different areas or layers specify different geomembrane materials – from thin LLDPE or FPO secondary liners to thicker HDPE primary containment membranes – without requiring machine changes between different liner zones on the same project.

Leister TWINNY T5 – Available Through iBuild, Authorised Leister Distributor in Oman

iBuild is an authorised Leister distributor in the Sultanate of Oman, providing pond construction contractors, aquaculture facility builders, mine liner installation teams, landfill engineering contractors, and civil infrastructure specialists with direct access to the TWINNY T5 alongside compatible combi-wedge accessories, drive rollers, and the full range of Leister geo-welding equipment. As a manufacturer-authorised technical partner, iBuild supports wedge configuration selection, temperature and speed parameter guidance for specific geomembrane materials, and lifecycle support to sustain TWINNY T5 performance across large-area liner installation programmes.

For geomembrane installation contractors, civil engineering teams, and liner programme managers across Oman and the GCC requiring an automatic combi-wedge welding machine that delivers approximately 50% higher welding speed than predecessor technology, Field-Kit terrain adaptability, and professional seam quality across nine membrane material types from 0.3 mm to 3 mm, iBuild is the authorised local source for the Leister TWINNY T5 – backed by manufacturer authority and in-country technical support.