About us
Leister Technologies AG
Plastic Welding Products
For 70 years, LEISTER has been the global market leader when
it comes to devices for welding thermoplastic polymers in construction,
commercial, and industrial environments.The Plastic Welding Products
business unit comprises the business lines
- Technical Textiles & Industrial Fabrics
- Hand Tools
- Plastic Fabrication, Roofing & Flooring
- Geo
Within the branch Plastic Welding, Leister Technologies AG distributes the brands Leister and Weldy.
Industrial Heating & Laser Systems
Since 1967, LEISTER has been the global market leader for hot-air modules and blowers, as well as hot-air blowers for industrial process heat applications.
At the start of 2018, LEISTER acquired Krelus AG, thus expanding its product portfolio to include powerful infrared systems.
LEISTER has provided plastic welding laser systems since 1998 and is also a technological leader when it comes to laser plastic welding processes.
The business unit is separated into the business lines
- Process Heat (incl. Infrared Systems)
- Laser Plastic Welding
Within the branch Industrial Heating and Laser Systems, Leister Technologies AG distributes the brands Leister, Novolas and Weldy.

Succession planning in the Group management of the Leister Group
For succession reasons the Board of Directors has appointed Mr. Martin Zingg as the new Group CEO of the Leister Group as of April 1, 2021. At the same time, the current CEO, Beat Mettler, will be elected as a member of the Board of Directors of the Leister AG. Learn more

UNIFLOOR 500
Automatic, efficient, quiet
Leister's reliable automatic floor welder, UNIFLOOR 500, is a fresh and reimagined version of the proven UNIFLOOR E/S models. It is suitable for welding the joints in resilient floor coverings made of plastic such as PVC, CV, PUR, antistatic ESD floors, as well as for sealing the joints in natural coverings made of linoleum and rubber. Thanks to its sophisticated design and the Automatic Nozzle Positioning (ANP) developed by Leister, the UNIFLOOR 500s hot air blower can be automatically rotated in and out by pressing the start button.
Product page UNIFLOOR 500

GROOVER 500-LP
Grooving Cordless, Powerful, Reliable
Grooving – even on uneven floors of plastic or natural materials, close to the edge or along a guide rail – all in a day’s work for the GROOVER 500-LP cordless grooving machine from Leister. No more messy rat’s nests of cables and tedious searching for electric power sockets on site. Your GROOVER 500-LP lets you switch from one room to another in no time. Cordless, powerful, reliable - that’s your GROOVER 500-LP.
Product page GROOVER 500-LP

Soldering Iron Kit
Safe soldering with TRIAC AT soldering iron kit
The TRIAC AT heat gun with soldering iron kit consists of a pointed soldering iron, soldering iron blank, soldering iron adapter and equipment stand. It's Leister's safe and environmentally friendly solution for electric soldering copper, zinc and chromium steel with hot air. Unlike soldering with a gas flame, the temperature of the soldering iron can be set precisely and individually, eliminating any risk of fires. With the soldering iron kit, the TRIAC AT becomes a multi-use tool, offering users the ability to solder and plastic weld with one tool.

TWINNY T7/T5
Plug and weld
If you want to weld thin or thick geomembranes (0.5 to 2.5 mm) 20-100 mils quickly, easily and safely, the TWINNY T7 or TWINNY T5 are your go-to automatic welders. Both tools are well-rounded, thanks to their practical design and intuitive operation. The TWINNY T7 comes equipped with highly-efficient data recording ability thanks to the LQS function, GPS, Wi-Fi and connection to the myLeister app. are guaranteed. Switch on and start welding – TWINNY T7 and T5.

UNIPLAN 300/500
Automatic, practical, safe
Whether you are welding truck tarpaulins, tents, or banners, the UNIPLAN 300 and UNIPLAN 500 automatic welders are the ideal choice. Integrated lifting of the tarpaulins and automatic swiveling-in of the nozzle make the work easier for you and increases reliability. Thanks to the movable swivel castor wheel, it is easy to get around obstacles such as grommets, hooks, or other accessories. Automatic, practical, safe – UNIPLAN 300 / UNIPLAN 500.
Product page UNIPLAN 300 / UNIPLAN 500

UNIDRIVE 500
Reliable and cost-effective – everywhere
The compact UNIDRIVE 500 semi-automatic hot-air welder impresses with its many advantages. Guided by two ergonomic handles, you can achieve the ideal pressure to ensure high-quality welding results. Change welding direction with ease via a rotating nozzle and reversible drive. The UNIDRIVE 500 is ideal for all roof applications, even in tight spaces, and welds two to three times faster than manual welding. Lap welding with the UNIDRIVE 500 – reliable and cost-effective – everywhere.