For over 70 years, Leister has been the global leader in plastic welding and industrial hot-air applications.

Whether you're welding PVC, TPO or Modified Bitumen membranes, the performance and reliability of our products makes Leister the preferred choice of professional roofing contractors worldwide.

With our cutting-edge technology, high rate of innovation, extensive process expertise, unmatched stability and reliability (not to mention our decades of experience), we work with our qualified employees toward achieving the highest possible product quality.

These standards are the benchmarks for which all product lines that carry our brands, LEISTER, AXETRIS and WELDY, strive to meet. Our innumerable patents and registered designs highlight our development ability and strength in innovation.

Visit our website.

LIVE From IRE 2026 with Leister!

NEXHEAT 300 A-LP

The NEXHEAT 300 A-LP wireless heat gun provides precise temperature control from 50 to 500 °C (122 °F to 932 °F) – adjustable in 5 °C (41 °F) increments. The air volume is adjustable in five stages and makes the device ideal for welding, shrinking or deforming plastics. The battery operation ensures full freedom of movement – without tripping hazards or the search for power sources. Whether in production halls or on the construction site: Relocation is wireless and flexible for greater efficiency in mobile applications.

The NEXHEAT is designed for indoor and outdoor applications. The main areas of application are in the areas of flooring, roofing, technical textiles, geotechnical and civil engineering as well as industrial. With optimized battery management, the NEXHEAT 300 A-LP has consistent performance and a short heat-up time. The temperature can be conveniently controlled and monitored via the digital display. In addition, the NEXHEAT has automatic temperature control. Together with the appropriate nozzle, the NEXHEAT is the ideal hot-air blower for repairs, detailed work and smaller projects on construction sites and in industry.

Details:

• Constant welding thanks to controlled temperature
• Ergonomic design ensures effortless operation
• Long-term power through battery management
• Less maintenance due to robust components

Check out the latest innovation!

Live at IRE 2026!

On demand webinar: NEXHEAT 300 A-LP

Cordless, flexible, efficient: With the NEXHEAT 300 A-LP cordless hot-air blower, you can weld, shrink and deform plastics anywhere – no power outlet required. Discover in the webinar how this tool simplifies and streamlines your daily work.

Cordless freedom on the jobsite

Cables and missing sockets often hinder welding, shrinking or deforming tasks. The NEXHEAT 300 A-LP solves this: work cordlessly – exactly where you need to.

Boost productivity with smart operation

The ergonomic design and intuitive display ensure comfortable handling, even during extended use. Precise temperature control offers full command and safety across all applications.

Flexible and efficient on the go

Benefit from the smart Bosch AMPShare solution: one battery for multiple tools. This saves time, reduces logistics, and makes your work simpler and more efficient. Whether welding roofing membranes, bonding floor coverings or processing technical textiles – the NEXHEAT 300 A-LP delivers fast, reliable results with top quality.

Webinar Highlights – What to Expect

• Product introduction: Get to know the new NEXHEAT 300 A-LP – the cordless hot-air blower powered by the Bosch AMPShare battery platform
• Application examples: Practical use cases for roofing, flooring and technical textiles
• Demonstration of highlights: ergonomic grip, safe handling, intuitive display, safety functions and precise temperature control
• Expert tips: Work efficiently, flexibly and cordlessly – with less logistical effort and more freedom of movement

Watch the webinar.

Live at IRE 2025!: Leister

VACUUM PLATE 100-LP

The VACUUM PLATE 100-LP from Leister is an easy-to-use, compact and cordless vacuum plate or vacuum bell jar for roofers and swimming pool builders. The universal AMPShare rechargeable battery (18 V) from Bosch with a 7-hour runtime ensures freedom of movement over long distances and immediate readiness for use of the vacuum testing device. Because the plastic plate, the pump and the battery are one unit, the vacuum test bell is compact, 2 kg light and can therefore be transported with one hand.

• Compact, 2 kg light and quiet
• Cordless thanks to AMPShare battery from Bosch
• Transportable with one hand
• Ready for use anywhere and immediately
• Easy to use

Learn more about the VACUUM PLATE 100-LP.

Leister Booth Interview at MRCA 2024!

The VARIMAT 700

The VARIMAT 700 is characterized by its robust construction and ergonomic design. The automatic roof welding machine comes in a sturdy rolling transport case, ensuring convenient and safe transportation to the place of use.

With a dead weight of 37 kg and optional additional weights, the VARIMAT 700 offers high joining pressure for constant process safety when welding thermoplastic sealing sheets and all types of membranes.

VARIMAT 700: benefits at a glance

• Optimized welding performance due to high contact pressure
• Swivel-in mechanism for quick and efficient nozzle insertion
• Visual and audible alarm when leaving the welding window with the Monitored Welding Assistant
• Flexible voltage selection between 230 V and 400 V
• Removable weights for easier transportation
• Triangular design ensures directional stability
• Sturdy rolling transport case for perfect device protection and ergonomic transportation
• LQS (Leister Quality System) for quality reporting
• Tried and tested welding recipes
• High welding speed
• LED light

 Learn more.

Introducing the UNIDRIVE 500 - Roof Welding Close to the Edge Made Easy

The new UNIROOF AT/ST roof welder is your flexible partner for welding thermoplastic roofing membranes on flat or pitched roofs (up to 30°).

Thanks to its slim design and construction, as well as the movable transport axle converting of the machine is no longer needed. Now, you can effortlessly weld close to the edge (to 100 mm ) at the parapet or on the parapet and as easily in narrow circumstances.

The UNIDRIVE 500 closes the gap between manual and automatic welding in a small, 9.9 lbs. lightweight and easy-to-handle semi-automatic hot-air welder.

Radius welds quickly and efficiently with the UNIROOF AT / ST. Pipe collars can be welded easily and quickly with the flexible axle of the UNIROOF AT / ST. Weld roofing membranes up to three times faster than hand welding with the UNIDRIVE 500. It's rotating nozzle and reversible drive makes UNIDRIVE 500 ideal for welding close to the edge and in tight spaces, either on or at the roof parapet, flashing wall, edge and curb details, as well as horizontal and vertical surfaces. The tool is equipped with three handles to provide ultimate welding comfort and balance. In addition, the UNIDRIVE 500 can be easily operated via its digital display.

• Reliable: Ergonomic handles for balanced pressure and comfort while welding

• Fast: Up to three times faster than manual welding

• Versatile: Rotating nozzle and reversible drive for dual-direction welding

• Practical: Compact and lightweight at 9.9 lbs.

• Economical: Low maintenance due to its brushless motors

• Intuitive: Simple user guidance and operation via digital display

• No converting: Thanks to the movable transport axle the UNIROOF masters welding closte to edge at or on top of the parapet. 

• Swiss Quality you can rely on: Field-tested design for ergonomic handling, flexible relocating and optimal machine guiding.

• The direct-driven, maintenance-free pressure wheel [drive motor integrated in pressure wheel] leads to clearly optimized overall performance and is easy to service. 

• Greater efficiency at construction sites: The new UNIROOF class brings an additional 38% (ST) to 66% (AT) higher welding performance compared to similar machines. 

• Welding roof structure profiles with a special profile kit. 

Explore our videos.

Radius welding with UNIROOF AT/ ST

Single Ply Roof Membrane Welding with the LEISTER Triac ST

The Leister Triac ST plastic welding tool being shown in use on the roof for single ply membrane welding

The TRIAC AT shows, at the push of a button, the current mains voltage (quality checking before the welding process)

The built-in motion sensor knows when the tool is not in operation and reduces the blower level to its minimum speed, which means up to 40% energy saving and noise reduction

Handiness, reliability and versatility are the key arguments in favor of the TRIAC ST. Its two-component handle gives users perfect grip, while the low weight of less than a kg ensures optimum weight balance. The  innovative motor and turbine design, combined with the heating element familiar from the TRIAC AT, enhance  the value even more. More than 80 nozzles fit onto the TRIAC ST; these are also compatible with the TRIAC AT and TRIAC S. 

• 100% Swiss made quality 

• 60 years of expertise in making hot-air tools – brought together in the new TRIAC ST 

• The sturdy, professional hot-air tool that weighs less than 1 kg/2.18 lbs 

• Functional design: two-component handle grip and optimum center of gravity ensure ergonomic working 

• Quick clean air filters 

• Automatic carbon stop (collector protection) and heating element protection 

Learn more.

Latest Promotions and Rebates

On demand webinar: NEXHEAT 300 A-LP

Cordless, flexible, efficient: With the NEXHEAT 300 A-LP cordless hot-air blower, you can weld, shrink and deform plastics anywhere – no power outlet required. Discover in the webinar how this tool simplifies and streamlines your daily work. Cordless freedom on the jobsite Cables and missing sockets often hinder welding, shrinking or deforming ...
View Promotion

Say Goodbye to Cables – Experience the Future of Cordless Plastic Welding

The NEXHEAT 300 A-LP wireless heat gun provides precise temperature control from 50 to 500 °C (122 °F to 932 °F) – adjustable in 5 °C (41 °F) increments. The air volume is adjustable in five stages and makes the device ideal for welding, shrinking or deforming plastics. The battery ...
View Promotion

Latest Spanish Content

Gana la temporada navideña con esta guía de regalos

Por Emma Peterson, traducido por Jessica Bravo. Desde herramientas hasta cursos de capacitación, el equipo de The Coffee Shops™ reúne los regalos perfectos para los profesionales del techado en esta guía para dar en grande esta temporada. Si tu año ha sido como el nuestro aquí en The Coffee ...
View Content

Latest International Content

Last call for IIBEC’s 2026 International Convention!

By Emma Peterson. Join The Coffee Shops™ crew and our industry partners in Sacramento for four days of education, innovation and industry connection. The Coffee Shops™ crew is putting the finishing touches on our travel plans to get to Sacramento, California March 12–15, 2026 for the International Institute of Building ...
View Content

Latest Canada Content

ROOFTech 2023 is Coming Soon!

By Evelyn Witterholt. Canada’s dedicated trade show for the construction industry is right around the corner. The 2023 ROOFTech Show is approaching fast! This trade show, dedicated to the Canadian construction industry, will take place on April 4-5, 2023 in Toronto, Canada at the International Centre. Register for tickets today ...
View Content

Latest Podcasts

Small Innovations for Big Improvements

In this Roofing Road Trips® episode, Karen Edwards talks with Dave Nordentoft of Leister about the real-world decisions behind choosing the right tools for service and repair work. What makes one welding gun better than another? How does a vacuum plate actually help roofers on the job? And what’s the ...
Listen to the Podcast

Latest Heat Welding Tech and Innovations

Tune into RoofersCoffeeShop’s RLW recorded live from the International Roofing Expo (IRE) with Heidi J. Ellsworth and guests Dave Nordentoft and Brittany Wykle of Leister. They discuss the latest advancements in heat welding technology for the single-ply roofing market, focusing on innovations that improve efficiency and quality. The conversation highlights ...
Listen to the Podcast

Dave Nordentoft - Redesigned VARIMAT

S6:E10 In this exciting episode of Roofing Road Trips, Heidi J. Ellsworth sits down with Dave Nordentoft from Leister to talk about the brand-new, redesigned VARIMAT automatic heat welder. Dave gives us a brief history of the VARIMAT and then dives right into the improvements made in this new version. ...
Listen to the Podcast

Latest Webinars

Cordless hot-air blower: NEXHEAT 300 A-LP by Leister

Cordless, flexible, efficient: With the NEXHEAT 300 A-LP cordless hot-air blower, you can weld, shrink and deform plastics anywhere – no power outlet required. Discover in the webinar how this tool simplifies and streamlines your daily work. Cordless freedom on the jobsite Cables and missing sockets often hinder welding, shrinking or deforming ...
Watch the Webinar

Leister Webinar: Say Goodbye to Cables – Experience the Future of Cordless Plastic Welding

Cables, limited mobility and missing power outlets are daily challenges when working with hot air on-site. In this exclusive webinar, we’ll introduce the solution: the NEXHEAT 300 A-LP cordless, battery-operated heat gun. This mobile hot-air blower offers flexibility, precise temperature control and intuitive display operation, allowing you to weld, shrink ...
Watch the Webinar

Latest Heat Welding Tech and Innovations

Join RoofersCoffeeShop’s RLW live from the International Roofing Expo (IRE) with Heidi J. Ellsworth and guests Dave Nordentoft and Brittany Wykle of Leister. They discuss the latest advancements in heat welding technology for the single-ply roofing market, focusing on innovations that improve efficiency and quality. The conversation highlights how Leister’s ...
Watch the Webinar

Read Listen Watch - Educational Content

Latest Heat Welding Tech and Innovations

Tune into RoofersCoffeeShop’s RLW recorded live from the International Roofing Expo (IRE) with Heidi J. Ellsworth and guests Dave Nordentoft and Brittany Wykle of Leister. They discuss the latest advancements in heat welding technology for the single-ply roofing market, focusing on innovations that improve efficiency and quality. The conversation highlights ...
View Content

Buy Online

Cordless, flexible, efficient: With the NEXHEAT 300 A-LP cordless hot-air blower, you can weld, shrink and deform plastics anywhere – no power outlet required. Discover in the webinar how this tool simplifies and streamlines your daily work. Cordless freedom on the jobsite Cables and missing sockets often hinder welding, shrinking or deforming ...
Read More

The NEXHEAT 300 A-LP wireless heat gun provides precise temperature control from 50 to 500 °C (122 °F to 932 °F) – adjustable in 5 °C (41 °F) increments. The air volume is adjustable in five stages and makes the device ideal for welding, shrinking or deforming plastics. The battery ...
Read More

The VARIMAT 700 is characterized by its robust construction and ergonomic design. The automatic roof welding machine comes in a sturdy rolling transport case, ensuring convenient and safe transportation to the place of use. With a dead weight of 37 kg and optional additional weights, the VARIMAT 700 offers high ...
Read More

Latest Videos

Leister Video Playlist

For over 70 years, Leister has been the global leader in plastic welding and industrial hot-air applications. Whether you're welding PVC, TPO or Modified Bitumen membranes, the performance and reliability of our products makes Leister the preferred choice of professional roofing contractors worldwide. See more videos from Leister on their YouTube ...
View Video

Partner Photo Gallery