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Welding of geomembranes for landfill sites
Reliable and durable

COMET

When it comes to constructing storage sites, the sealing system is the heart of the installation and it is this system's reliability which is crucial in determining the site's long-term safety. HD-PE, PP, PVC or TPO is usually used as the bottom geomembrane and can be up to 3 mm thick. The top geomembrane over the bulk goods generally consists of a thinner material. Leister offers welding machines for all requirements: the hot-wedge and combi-wedge machines are designed differently in terms of welding pressure. Various models are available, from the most powerful ASTRO USB machine to the lightweight TWINNY S. All tools feature special nozzles, hot wedges and pressure rollers, which can be used to double weld the sheets which have been laid in an overlapping arrangement. After welding, the test needle and compressed air can be used to check the integrity of the test channel which has just been created. A version with a USB memory system is also available for certain machines, enabling all relevant parameters to be recorded. Leister also offers the EXAMO, VACUUM BOX, and vacuum bell tools for additional inspection of the weld seam

  • Overlap welding of plastic geomembranes in the construction of storage sites
  • Welding seam quality which can be inspected
  • Welding of details
Leister has the solution
Leister offers various hot-wedge and combi-wedge machines for welding HD-PE, PP, PVC or TPO materials. Welding seam tensiometers improve safety. A broad spectrum of different hand welding tools completes the range.
  • Efficient welding with machines providing a high welding pressure, including for steep pitches
  • Lap welds with test channel
  • Hand extruders for the extrusion welding of connections and details
  • Tensiometers for checking the tensile load and integrity
  • Recording of data with a USB memory system
  • Wide range of hand welding tools and accessories

Hot-air hand tools
TRIAC AT
The TRIAC AT is an intelligent hot-air hand tool for welding and shrinking plastics that is suitable for on-site use.
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TRIAC ST
Handiness, reliability and versatility are the key arguments in favor of the TRIAC ST.
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Extrusion Welders
FUSION 2
The FUSION 2 convinces with its ergonomic design. The simple operation and first-class welding quality have helped it to become the break...
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FUSION 3
With its long and narrow shape, the FUSION 3 enables comfortable work, even on the floor.
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FUSION 3C
The somewhat shorter FUSION 3C provides an astounding output volume of up to 3.6 kilograms per hour.
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WELDPLAST S2
The WELDPLAST S2 is a compact, ergonomically designed workhorse. The handy size extruder puts out two kilograms per hour without difficulty.
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WELDPLAST S2 PVC
The WELSDPLAST S2 PVC has integrated corrosion protection and has been especially designed to satisfy the high requirements of PVC extrus...
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WELDPLAST S4
The WELDPLAST S4 is the first extrusion welder of its kind with brushless, maintenance-free motor for generating preheated air. Output of....
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WELDPLAST S6
WELDPLAST S6 is the world's highest rated handheld extrusion welder. With an output of 6 kg/h, it is surprisingly maneuverable.
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Hot-wedge Welders
ASTRO USB
He welds up to five meters per minute and allows for the consistent recording of all relevant welding parameters.
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COMET
The small powerhouse COMET is specially designed for the demands of landfills sites, mines and tunnels.
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COMET USB
COMET USB's memory system is designed for use on construction sites. Because this compact hot-wedge welding machine records all relevant ...
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GEOSTAR G5
The super-fast flexible all-rounder with many accessories welds practically every type of plastic while itself weighing only 16.4 kg.
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GEOSTAR G7
The workhorse. Undefeated champion in its weight class (17.7 kg). With extra amounts of driving force and large welding wedge (130 x 50 mm).
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Combi-wedge Welders
TWINNY S
This lightweight tool TWINNY S is optimized for overhead welding and is ideal for thin materials used in civil engineering and tunnel con...
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TWINNY T
The TWINNY T is excellent for welding PVC and other thin or soft membranes.
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TWINNY T USB
TWINNY T USB makes data storage and is excellent for welding PVC and other thin or soft membranes
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Semiautomatic hot-air tools
TRIAC DRIVE AT
The TRIAC DRIVE AT are up to three times faster than manual welding. The unique, semiautomatic welding tool.
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Testing instruments
Test needle
Air pressure test manometer used in civil engineering for proving the tightness of double welding seams
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COUPON CUTTER
Robust weld test cutter for use in civil engineering.
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EXAMO USB
EXAMO USB performs tests at the construction site quick, reliable and uncomplicated.
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VACUUM PUMP
Pump to generate a vacuum in the VACUUM BOX
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VACUUM BELL
Testing bell for proving the tightness of double overlap welding seams in civil engineering
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