Leister

🇨🇭 Switzerland Industrial Components

Plastic welding, process heat, hot-air tools, laser plastic welding and infrared technology for industrial applications.

Leister is a privately owned Swiss technology group associated with plastic welding and process heat. The company’s origins date to 1949, when Karl Leister began production in Germany, and its success story has continued in Switzerland since 1963. Leister Group now employs around 900 people and sells globally under brands including Leister, Weldy and Axetris. Leister should not be described as generic industrial tools; its core profile is plastic welding and process heat.

Products and applications

Leister products include hot-air tools, automatic welders, extrusion welders, plastic welding systems, process heat components, air heaters, blowers, infrared heaters, laser plastic welding systems and related accessories. Its technologies are used in roofing, flooring, civil engineering, tunnelling, plastics fabrication, process heat, packaging, automotive, electronics, medical devices, textiles, membranes and industrial processes where precise heat, plastic joining or thermal processing is required.

Product Categories

Hot Air Tools

Laser Plastic Welding

Process Heat Systems

Welding Accessories

Product Lines & Series

TRIAC (Hand Welders)
VARIMAT (Automatic)
WELDPLAST (Extrusion)
NOVOLAS (Laser)
MISTRAL/HOTWIND (Process Heat)

Products & Components

TRIAC hot air hand toolsVARIMAT automatic roof weldersUNIROOF flat roof weldersTWINNY automatic weldersWELDPLAST extrusion weldersFUSION floor weldersNOVOLAS laser welding systemsMISTRAL process heatersHOTWIND blowersLE MINI heat gunsNozzle sets and accessoriesRollers and guidesTest equipment (spark tester)Seam probesWelding rods and filaments

Solutions & Applications

Roofing membrane weldingGeomembrane installationTank and pipe liningAutomotive interior weldingMedical device assembly (laser)Packaging film sealing

Industries Served

Construction (Roofing)Civil Engineering (Geomembranes)AutomotiveMedical DevicesPackagingIndustrial Manufacturing

Technologies & Expertise

Controlled hot air generationLaser transmission weldingExtrusion welding (filler rod)Digital temperature controlAutomatic seam trackingIoT-connected welding (Leister Digital)

Certifications & Standards

ISO 9001:2015 ISO 14001:2015 CE Marking DVS (German Welding Society) FM Approved (roofing)

Company facts

Headquarters: Kägiswil, Switzerland
Founded: 1949 in Germany; Swiss headquarters and production since 1963
Employees: Around 900 employees
Ownership: Privately owned Leister Group

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Profile transparency

Data status: Publicly researched profile
Sources: Official website, public company and product pages
Last reviewed: April 2026

Publicly researched profile. Supplier information is based on publicly available company and product information and can be corrected, claimed, or removed on request.

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