Benefits of the Leister Unidrive 500 Welder

By Kevin Malone

Leister, the leading multinational manufacturer in plastic processing tools, offers an incredible tool that can serve every roofer. Dubbed the 'tool for every roofing application,' the Leister Unidrive 500 welder closes the gap between manual and automatic welding. It is the successor to the Triac Drive welder that offers improved ergonomics and performance.

Handheld, light, andcompact for secure storage, the Leister Unidrive 500 Welder is thesemi-automatic heat tool that you need for precise results.

Here are the main benefits of the Leister Unidrive 500 Welder.

  1. Safety
  2. Economic value
  3. Easy Handling
  4. Speed
  5. Versatility

If your businessrequires a hot air tool that doesn't take up much space but can also performtouch-ups and details, this is an excellent model to explore.

Product Overview

The Leister Unidrive 500 is a semi-automatic welder suited for all roofing applications, but it is especially strong at small details on edges, curbs, and flashing. This model unites the best of both worlds regarding manual and automatic welding. The Unidrive 500 can weld a wide range of thermoplastic and elastomeric membranes via lap welding, including:

  • Polyvinyl chloride (PVC)
  • Thermoplastic olefins (TPO) sheets
  • EPDM Waterproofing membranes

The Unidrive 500'suser-friendly display allows you to select heat and other settings based on thematerial profile, ensuring the best results based on the material type. It canalso weld water stops to waterproofing sheets and plastic profiles, which isimportant for aesthetic designs or waterproofing.

The machine is easy tomaneuver and generates the optimal pressure for all basic welds. It is mountedon wheels and weighs only 9.9 pounds. Because it is semi-automatic, it producesresults three times faster than a standard manual hot air welder. It also has arotating nozzle that enables operators to weld close to the edge of roofs andin tight areas.

On job sites whereflexibility and precise welds are vital, the Leister Unidrive 500 is the toolto have on hand. Are you ready to experience hand welding redefined? 

Here are fivebenefits of the Unidrive 500.


Users can carefullyguide this compact welder with two handles for precise movements. Since it alsoweighs under 10 pounds, you can handle it easily without struggling with userfatigue. It is also an accurate instrument that achieves the correct pressureto keep conditions extra safe.

2. Economic Value

The Unidrive 500 modelis priced to be an accessible addition to a roofer's equipment cache. It alsosaves operators time and money on maintenance. The Unidrive 500 is virtuallymaintenance-free because its motors are brushless and its dependable Swissquality.

3. Easy Handling

When it comes to lap welding, the Unidrive isone of the most versatile tools you can have. It is lightweight and compact,reaching just 30 centimeters in height. Its reversibledrive allows you to weld in either direction too. The model's three ergonomichandles offer outstanding comfort and balance.

Because it is soportable, it can tackle jobs that bigger, heavier welders have trouble reachinglike small terraces, roof parapets, domed skylights, end joints, and otherareas that require compact instruments or manually applied precision.

4. Speed

The Unidrive 500performs jobs 3 times faster than manual welding. The user interface is easy tounderstand and operate, eliminating a time-consuming learning curve as well.Whether you are welding vertical, curved, or horizontal surfaces, this machinecan complete the job without having to use a slower manual welder. Users canalso be in full control of the speed through digitally regulating it throughthe user display.

5. Versatility

If you ever have a doubtabout your automatic welder reaching a tight spot, then having the Unidrive 500on hand can give you great peace of mind. This small machine has a rotatingnozzle that can reach small spaces quickly.

The Unidrive 500'srevolutionary compact design makes it possible to work in areas that aretypically inaccessible for any welding besides manual. It brings theconsistency, speed, and quality of semiautomatic welding to these areas too. Itcan also weld short distances? as short as 60 millimeters, and it can weld inthree different widths.

By owning this tool,contractors can be confident to rise to the challenge of diverse welding tasksand produce outstanding results.

Leister Semi-Automatic Welders For Sale

Intech Equipment and Supply is a full-service equipment and parts supplier for various industries, including roofing and spray foam. If you would like to know more about the Leister Unidrive 500 or any other semi-automatic hot air welders, then reach out to our team of experts today.

We're here to help you choose the rightproduct, make smart additions to your equipment, and troubleshoot problems aswell.

Contact us. Our team is ready to meet your unique equipment and accessory needs.

About Kevin Malone
Kevin Malone is a leading expert in the spray foam insulation industry with 34 years of experience in spray foam fluid handling and a passion for innovation. He currently offers his extensive knowledge to Intech Equipment and Supply customers by supporting them in selecting quality spray foam equipment to optimize their business. Learn more about Kevin here.


Intech Equipment & Supply was founded in 1995, and has since grown to become the leader in spray foam equipment, mobile spray foam rigs, and parts supplier. With locations all across North America we are available when you need us most.