TWINNY T7 - Plug & Weld 50% Faster

The Newest Leister Welder

Geomembrane Welding Equipment

Automatic Welders

Comparison Chart
A quick product comparison for automatic geomembrane wedge-welding tools.

GEOSTAR G5/G7 Wedge Welder
The GEOSTAR wedge welder is the fastest Leister wedge welder available with a top welding speed of 12 m/min, depending on conditions. 

COMET Wedge Welder
The world’s smallest fully integrated hot wedge welding machine weighing in at only 7.5 kg, designed specifically for civil engineering applications.

TWINNY T7 / T5 Hot Air Welder
Ideal for welding geomembranes from 20-100 mils (0.5-2.5 mm), the TWINNY T5 welds almost 50% faster than its predecessor, TWINNY T, while the TWINNY T7 is twice as fast​

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IAGI Certified Welding Technician (CWT) Testing Services

STANMECH is a proud member of the International Association of Geosynthetic Installers (IAGI). We have approved Proctors on-staff to administer Certified Welding Technician (CWT) testing. IAGI’s Certified Welding Technician (CWT) program recognizes the knowledge, experience and skill of those technicians who hold the certification. For more information about IAGI's CWT program, visit their website www.iagi.org.

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​Recent Articles & Case Studies

Wedge versus Hot Air Welding of Thermoplastic Single Plies
The main difference between a wedge and a hot air welder is the way in which heat is transferred to the material. With a wedge welder, a solid piece of metal—the wedge—is heated and inserted between the two pieces of material. With a hot air welder, air is heated and then delivered between the two pieces of material via a hot air nozzle. ​

How to: Thermoplastic Membrane Test Welds
​Test welds are an important part of welding thermoplastics whether they’re used for roofing, tarps, pools, tunnels, landfills, or tailings ponds. Welds should be tested first thing in the morning and several times throughout the day to ensure that environmental changes are not compromising the strength of your welds. 

Why Your Hot Air Tool Needs Airflow​
Inside every Leister hot air tool is a heating element composed of a ceramic honeycomb supported resistance wire filament (See below). Electric resistance wire heaters work on the principle that when electrical current passes through a conductor heat is generated, and the amount of heat generated is related to the resistance of the conductor. 

Leister helps with the construction of 42 tunnels for the first freeways in Montenegro
​In order to connect up the new freeway network, which will snake its way all over Montenegro, 42 tunnels and 92 bridges/viaducts will need to be built. The tunnels are scheduled to be finished by 2020.  

​Role for LEISTER in Constructing Tunisia's First Road Tunnel
​In an effort to stimulate its economic and social development, the Republic of Tunisia is making investments in its road infrastructure. For the first time in the country's history, this is involving the construction of a road tunnel featuring state-of-the-art sealing work that uses geosynthetics.

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​STANMECH Technologies Inc.

Established in 1981, STANMECH is your local Leister distributor. Our knowledgeable staff are here to answer any questions you may have about Leister tools. Our in-house repair centre is the only Authorized Leister repair centre in Canada and uses only genuine Leister parts in all repairs. Located in Burlington ON, our warehouse stocks equipment, accessories, and parts to ensure quick delivery to our customers.

​Leister Technologies AG

Leister Technologies AG has over 60 years experience building hot air tools for industries including flooring, geomembrane installation, industrial fabric welding, manufacturing, plastic fabrication, and roofing. Leister tools are known for their high quality and long service life.