Weld Roof Membranes Reliably: VARIMAT 700

A person wearing a red hard hat and black clothing is standing on a large, flat white roof, operating a green and silver automatic welding machine. In the background, another individual in similar attire works near green equipment on the same rooftop, surrounded by a scenic view of lush, forested mountains and a clear sky. The location appears to be an elevated outdoor worksite, possibly for installing or sealing a roofing membrane in a rural or mountainous area.

Product Stories24 janv. 2024

Hello roofers. Now it's here - the VARIMAT 700 automatic roof welder with LQS for reliable thermoplastic roof membrane welding. It has many advantages. What are they? Find out in this blog post.

Author: Chantal Manella, Promotion Specialist, Leister Technologies AG, Switzerland

First, let's talk about how the VARIMAT 700 is delivered. It comes in a sturdy rolling transport case with extra-large wheels and a telescopic handle, similar to luggage. Yes, you heard right. Just as you would take your "luggage" to the airport, you can conveniently roll the 37 kg VARIMAT 700 in its case to the desired location on the construction site. This is ergonomic and will certainly please all roofers. Vacation feeling included.

On a construction site with a scenic mountain backdrop, a person in black work clothing and a red hard hat is pulling a large green LEISTER-branded tool case across a flat rooftop. Another worker in a red hard hat is kneeling nearby, using a hand tool on a cylindrical structure with a red top. Yellow construction cranes and lush green trees are visible in the background under a clear blue sky.

Close-up of a person adjusting or assembling a green and silver industrial hot air welding machine, using both hands—one with a wooden-handled tool, the other positioning a black metal component on the device.

Ever wonder why the VARIMAT 700 weighs 37 kg? There is a good reason for this. Thanks to the optimized placement of its integrated internal weight, you achieve greater contact pressure and constant process reliability when welding all membrane types. By the way: If required, simply add an additional weight (3 kg) for increased welding pressure.

Front view of a green and silver automatic welding machine on a flat white rooftop, with a person in the background walking away. The setting is outdoors, featuring mountains and blue sky.

Balanced - What does that Mean?

Our engineers have devised a balanced triangular design (wheels/transport axle) for the VARIMAT 700. As a result, the roof welding machine provides stable handling and tracks straight. To increase versatility, it also has an adjustable rear transport axis that can be easily retracted when welding against a wall, for example.

Flexible Voltage Selection

Front view of a green and silver automatic welding machine on a flat white rooftop, with a person in the background walking away. The setting is outdoors, featuring mountains and blue sky.

Hello Pool Builder

So far, we have only discussed using the VARIMAT 700 on the roof. But there is another area of application that require a little deeper "dive". The VARIMAT 700 is also ideal for welding membranes in swimming pool construction. And that's not all. Even truck tarpaulins and advertising banners can be conveniently welded with the automatic welding machine.

Leister Quality System LQS Roofing

The VARIMAT 700 automatic welder is equipped with the proven Leister Quality System - LQS Roofing. This allows you to create quality documentation of the completed welds based on the GPS coordinates, saved and shared via the myLeister app. Thanks to the device's power management, even with undervoltage of up to 20 %, you can still achieve required set welding temperatures. As soon as the undervoltage is greater than 20 %, the VARIMAT 700 switches off automatically, as the set welding parameters can no longer be maintained, and the welding quality may no longer be guaranteed. To help you set the right welding parameters quickly, Leister offers the ability to create custom welding profiles as well as a "library" of tried-and-tested welding recipes in the myLeister app.

A person wearing a red hard hat is using a smartphone to control or monitor a green industrial welding machine on a light gray surface. The individual stands closely beside the equipment, interacting with the phone's screen, which displays an interface with several selectable horizontal bars. The setting suggests a technical or industrial environment, possibly related to construction or fabrication work.

VARIMAT 700: The Best 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 thanks to the Monitored Welding Assistant
Flexible voltage selection between 230 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
Proven welding recipes
High welding speed
LED light

And the good news at the end. Here you can see the VARIMAT 700 in action.

VARIMAT 500 and VARIMAT 300

Good to know: The VARIMAT 700 is available in two other versions (VARIMAT 500 and VARIMAT 300). Would you like to find out more about these two welding machines? Then visit our product pages:

www.leister.com/product/varimat-500

www.leister.com/product/varimat-300

Do you have any questions or would you like a personal consultation? Our experts in the Roofing business line will be happy to help you.