Leister Plastic Welding Machines

Leister’s plastic welding machines are built for speed, power and efficiency. Each welder is designed to produce consistent, quality welds for its specific application—such as roofing, flooring, civil engineering, or sign and banner welding.

Click on any of the products below for details and descriptions, suggested uses and applications, how-to and troubleshooting resources, part diagrams, and information about repair services. If you’re having problems with your Leister plastic welder, contact our authorized service center

ASTRO

ASTRO

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Built for civil engineering applications, the ASTRO is a hot-wedge welder that can reach welding speeds up to 16 ft/min.

BITUMAT B2

BITUMAT B2

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The flameless BITUMAT B2 is designed for seam welding modified bitumen roof sheets (SBS, APP). It is faster, more effective and safer than welding with open flame.

COMET

COMET

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Light and compact, this hot-wedge welder is built to satisfy the demands and durability required for civil engineering applications, such as landfill sites, mines and tunnels.

TRIAC Drive

TRIAC Drive

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The semi-automatic TRIAC Drive’s lightweight, compact build makes it perfect for detailed seam welds. It works on all degrees of roof slope, including vertical surfaces.

TWINMAT

TWINMAT

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This combiwedge welding machine is powerful—ideal for civil engineering applications that require joining HD-PE materials up to 5 mm thick. 

TWINNY S

TWINNY S

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The TWINNY S is lighter version of the TWINNY T, optimized for overhead welding of thin materials used in civil engineering or tunnel construction.

TWINNY T

TWINNY T

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The TWINNY T is a combiwedge welder ideal for joining thin materials used in civil engineering and tunnel construction.

UNIFLOOR E

UNIFLOOR E

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The UNIFLOOR E is the only Leister plastic welder designed for floor coverings made of PVC-P, PE, linoleum and modified thermoplastics. 

UNIPLAN E

UNIPLAN E

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This automatic billboard and banner fabric welder is lightweight, fast and precise for consistent, repeatable thermoplastic fabric sheet welds. 

UNIROOF E

UNIROOF E

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The UNIROOF E’s compact size makes it ideal for thermoplastic seam welds on smaller roofs, along roof edges or in hard-to-reach areas. 

UNIROOF E 40mm

UNIROOF E 40mm

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Ideal for overlap welding hard-to-reach areas and smaller roofs, the new UNIROOF E 40mm welds better in cold environments and with thicker fabrics.

VARIANT T1

VARIANT T1

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The VARIANT T1 is a slim, compact billboard and banner welder that can reach speeds of 59 ft/min while allowing for a perfect view of the seam from all sides. 

VARIMAT V2

VARIMAT V2

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Leister’s most popular thermoplastic roofing welder, the VARIMAT V2 offers some of the fastest welding speeds of polymer-roofing membranes on the market.