BAK LarOn 21 High-Speed Automatic Roof Welder #6600402

In stock
Check for local delivery
As low as $8,395.00

High Speed Automatic Roof Welder is Fastest Welding Machine In The World at 68 Feet Per Minute (21 meters/min)

NEW for 2021, BAK has introduced their latest breakthrough in roofing heat seam welder technology with the LarOn 21 automatic roof welding machine. This walk behind automatic heat welder for TPO, PVC, EPDM, Modified Bitumen, thermoplastic membranes and other tarpaulins is in a class of its own. Built-in GPS tracker w/ BAK mobile app for tracking your machine, a 3-year warranty, highspeed and performance make it the most popular single-ply membrane welder. The BAK LarOn 21 outperforms the Leister Varimat in every single performance point.

  • HIGH-SPEED WELDS at 68.8 Feet Per Minute! (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 your Phone and/or 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 the job, thanks to the fastest automatic welding machine on the market. The BAK LarOn 21 outperformed the Leister Varimat 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 6600402
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

BAK-ag LaRon 21 Special Features:

  • Continuous operation possible because of brushless motor
  • Designed for the most demanding job sites
  • Digital display to check voltage before operation
  • Adjustable, stepless air flow, speed and temperature
  • Best automatic hot-air heat welder for the welding of roof membranes
  • Modified bitumen possible with converting kit 80mm or 100mm
  • Integrated GPS tracker - location of the machine is known at every moment with the Mybak App

100% Swiss Made!

Recommended items & accessories