BAK LarOn 21 High-Speed Automatic Roof Welder

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BAK LARON 21 High Speed Automatic Roof Welder The Fastest Automatic Welding Machine In The World at 68 Feet (21 Meters) Per Minute!

NEW for 2021, BAK has introduced their latest breakthrough in roofing heat seam welder technology with the LarOn 21 automatic roof welding machine. This new walk behind TPO, PVC, EPDM Single Ply Roof Membrane Seam Welder is in a class of its own. 

New features include:

  • Fastest Roof Welder Available! @ 68.8 FPM (21 meters per minute)
  • Variable Welding Speed between 1.5 Feet to 68.8 Feet Per Minute
  • Integrated GPS Tracker: Know where your welder is at all times!
  • MyBAK App for Phone, Tablet
  • For welding all thermoplastic roofing materials
  • Telescoping / folding T-handle
  • Voltage Test Mode: Displays incoming Voltage before turning on!
  • Lockable airflow potentiometer
Financing Available for orders over $1,000

The NEW BAK LarOn 21 automatic robot roof welder is very user friendly, easy to handle, and ergonomic thanks to the precision design and balance. Welding TPO, PVC, EPDM and other tarpaulins with the BAK Laron 21 will make your single-ply roofing jobs much easier, faster, and more efficient while saving you time and money on every job, thanks to the fastest automatic welding machine on the market. The BAK LarOn 21 outperformed the Leister Varimat machines on every single performance point; some of which included how easy it is to operate each robot welder, the overall speed and accuracy of seam welds, variable temperature control, overal maintenance, application versatility, brushless motor life, the heating element reliability and many more points of focus. 

Fast, Reliable, Easy To Use: Continuous automatic operation with brushless motor

  • Heavy Duty: Built for daily, extended use on the most demanding job sites
  • LCD Screen: Digital display to check voltage before operation
  • Optimal Control: Stepless adjustable air flow, speed and temperature
  • Roof Seamer: Designed for welding roofing membranes
  • Versatile: Modified Bitumen weld capable with conversion kit 80 mm or 100 mm
  • Integrated GPS Tracker: Location of the machine is always known!


Voltage: 230 Volt, 400 Volt
Power Consumption (W): 4600 Watts, 5700 Watts
Frequency (Hz): 50/60
Temperature (° F): 68 1148
Welding Speed (ft/min): 1.6' 68.8 feet per minute
Dimensions L x W x H(in): 24" x 16.49" x 12.59"
Weight: 88 lbs

More Information
Manufacturer Part Number 660
Manufacturer BAK
Weight 88lb
Country of Manufacture Switzerland
Length 24in
Width 16.5in
Height 12.5in

The BAK LARON 21 Automatic Walk-Behind Overlap Seam Welder for Single Ply Roof Membranes is a Robotic Hot Air Heat Wedling Machine from BAK-ag. The BAK LARON 21 is Swiss Made by the original designer of Leister Technologies Varimat and their other hot air tools and head welding machines.

LarOn-21 Options:

  • LarOn 21 230V 40mm: #6600402
  • LarOn 21 230V 80mm: #6600405
  • LarOn 21 230V 100mm: #6600408

LarOn-21 Kits:

  • BASIC KIT for LarOn 21 230V 40mm: 660402BK
  • DELUXE KIT for LarOn 21 230V 40mm: 660042DK

LarOn-21 Parts and Accessories:

  • LarOn 21 Overlap Welding Kit 40mm: #6601479
  • Metal toolbox: #1013
  • Heating element: #5107612
  • Air dam belt: #104224
  • Filter: #6600601
  • continuous operation possible because of brushless motors
  • designed for the most demanding job sites
  • digital display to check voltage before operation
  • air flow, speed and temperature stepless adjustable
  • for the welding of roofing membranes
  • modified bitumen possible with converting kit 80mm or 100mm
  • integrated GPS tracker - location of the machine is known at every moment
  • Mybak App
  • 100% Swiss Made!
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