Welwyn Tool Group

The approved UK sales & service centre

The approved UK sales & service centre for Leister

Leister UNIROOF AT 40mm 120V

Product Code:
AT 120V

Compact DIGITAL 40mm Overlap Welding Machine for Single Ply Roof Membrane. This latest ultra-slim design incorporates a maintenance-free blower and welds at speeds 38-66% faster than the previous Leister UNIROOF E model.

Estimated Delivery: Next Working Day (order before 3pm)


Leister UNIROOF AT 120V

The very latest in the range of Leister single ply membrane digital roof welding machines, the Leister UNIROOF AT 120V ensures a consistent 40mm overlap weld particularly for smaller installation areas, or in areas that are technically confined but still need to meet the technical requirements of 40mm.  It has ergonomic handling, is flexible in relocating and has optimal machine guiding ability.

This latest ultra-slim design digital machine incorporates a maintenance-free direct drive with closed-loop technology.  It's faster too, achieving a 66% higher welding performance compared to similar machines and significantly faster than the previous Leister model the UNIROOF E.  In addtion the new Leister UNIROOF AT 120V requires no retooling, thanks to a movable transportation axle.  

That means less down-time between configurations.  With the optional profile kit (155.414) welding roof structure profiles is a breeze.  The new weight attachment areas on the machine allow flexibility in placing the additional pressure where it's required - either on the side or front of the machine.

Key Features

  • Powerful 1800W heating element for greater power reserve even at cold temperatures or with thick material
  • Controlled closed-loop technology with display guarantees a constant reliable weld for a leakproof roof
  • Adapted guide roller for even easier control when welding
  • Powerful drive for gradients up to 30º
  • Lightweight and compact
  • Welds PP, PVC, TPO, ECB, EPDM, EVA, FPO, PO, PIB (other materials available on request)
  • Freely adjustable guide bar ensures ideal, ergonomic handling
  • Optimal centre of gravity creates greater roller pressure allowing a constant weld quality
  • Power 1800W
  • Weight 17.5kg (incl. 3 additional weights)
  • Temperature range between 100 - 620ºC


The Leister UNIROOF AT 120V employs the same operating controls as the Varimat V making it straightforward and intuitional to use for materials such as PVC, TPO, ECB and EPDM. At a weight of just 17.5kgs including the cable, the Leister UNIROOF AT 120V is a lightweight and easy to manage partner on the roof that will ensure a consistent and reliable weld at lengths of up to 10 meters per minute.

Technical data: UNIROOF AT 40 mm 120V 

  • Amperage A: 15
  • Voltage V:  120
  • Power W: 1800
  • Technology:  Maintenance-free direct drive, digital closed-loop technology
  • Material: PP, PVC, TPO, ECB, EPDM, EVA, FPO, PO, PIB (other materials available on request)
  • Temperature (stepless): 100 to 620ºC
  • Drive Speed (stepless): 1.0 - 10.0 m/min
  • Welding seam width: 40mm
  • Size (L × W × H) mm: 475 × 244 × 260
  • Weight: 17.5 kg (incl. 3 additional weights)

Included with purchase: UNIROOF AT 120v 40 mm, user manual and DVD, handle with guide bar, 3 additional weights, storage case


Standard Next Working Day Delivery

£4.50 +VAT for items up to and including £100 (ex VAT)

£7.50 +VAT for items over £100 (ex VAT)

Next working day applies to orders placed online before 3pm.

LEISTER Machines and Extruders

In order to tailor the correct machine to the correct job, for all LEISTER machines and extruders, we would recommend contacting our experts either online or via +44 (0)1707 331111 to discuss your needs and to place your order.  For information these items are generally available as a next day delivery, if ordered before 3pm, with delivery charged at £11.95 +VAT

Delivery Exceptions and Exclusions

Unfortunately there are a few areas where next working day delivery isn't possible because of their remote location. However we always try to delivery to these areas within 2 working days. In certain circumstances items can sometimes take more than 7 days due to limited courier availability and weather conditions in these areas.

The restricted postcodes are as follows:

 ZE, HS, KW, IV, AB, PH, DD, PA, BT, IM, GY, JE, PO (Isle of Wight).

Where restricted postcodes are on the Mainland delivery will be:

£4.50 +VAT for items up to and including £100 (ex VAT)

£7.50 +VAT for items over £100 (ex VAT)

A minimum of two working days applies to orders with Mainland restricted postcodes placed online before 3pm.

For restricted postcodes that are not on the Mainland delivery will be:

£14.50 +VAT for all items

For these items a minimum of two working days applies to orders placed online before 3pm.

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