Benefits of the Leister Triac St

By Kevin Malone

Contractors who need a versatile and efficientplastic welder benefit greatly from owning the award-winning Leister Triac ST. This manual hot airwelder weighs less than 3 pounds and is compatible with add-ons like theMINIFLOOR drive unit, which converts it to a small automatic welder. This toolis adept at plastic and floor welding, single plyroofing, geomembrane welding, and other industrial applications.

Due to its Swiss-made durability and excellent performance, contractors around the world have made the Leister Triac St, their manual welder of choice. Here are the benefits that have made this welder the hot air hand tool preferred by pros across many industries.

Leister's Legacy

Leister is an industry leader in marketing and manufacturing hot air guns, plastic welders, industrial heaters, and other construction technology. The company's wide product range addresses the unique needs of contractors who work with thermoplastic membranes and other cutting-edge elements. Based in Switzerland, Leister is a worldwide distributor, providing excellent solutions to expedite welding projects and to ensure consistent, high-quality results.

Product Overview

The Triac ST is the 7thgeneration hot air manual welding tool from Leister. It is a multi-purposepiece of equipment that takes up little space but has a mountain of uses. Itcan weld a variety of materials, such as:

  • Thermoplastics
  • Thermoplastic elastomer and bitumen plates
  • Pipes
  • Profiles
  • Sealing layers
  • Coated fabrics
  • Foils
  • Foams
  • Tiles and layers

Operators can alsoadjust the heat to other temperatures to dry surfaces, heat thermoplastics justenough to form, couple, or bend them, shrink components, solder tubing, andconnectors, defrost, melt adhesives, and ignite items.

The Triac ST is useful forcountless applications and is an invaluable item to have on hand.

A Must-Have Item

The Triac ST raises thebar for plastic welding standards. It is the successor of the Leister Triac Sthat offers improvements to the previous model. Weighing just 2.18lbs, it ishighly portable, easy to handle, and a snap to store in its carrying case.

The Triac ST is the mostpopular of Leister's welders for its many benefits, which include:

  • Affordability & Versatility
  • Excellent Handling
  • Low Maintenance
  • Ability to Convert to an Automatic Welder

Affordability & Versatility

The Triac ST easily fitsinto a contractor's budget, costing far less than an automatic welder. It alsooffers an incredible value for its price since it can perform countlessfunctions that are useful in construction. Not only can it weld many materials,but it can also ignite, melt, solder, shrink, bend, and mold a variety ofmaterials.

It's compatible withmore than 80 nozzles and accessories that open it up to even more applicationsand possibilities. Also, nozzles used with the previous Triac models arecompatible with the ST, saving contractors even more money on parts.

Excellent Handling

This handheld tool isthe very definition of agile welding. Since it weighs a little over two poundsand is equipped with a two-component handle, it handles smoothly as you weld intight quarters and on dynamic surfaces. Contractors experience little to nofatigue using such a light tool with ergonomic grips. This along with itsoptimal center of gravity also contributes to higher precision, and lessdowntime.

Low Maintenance

This tool may be small,but it is packed with intelligent features that make your life simpler. It hasheating element protection and an automatic carbon stop. The air filters arealso easy to clean. The Triac also has a sturdy motor and turbine design whichis built to last. These features work together to make this tool quick totroubleshoot and easy to maintain during its lifetime.

Can Convert to an Automatic Welder

While the Triac ST is anexcellent manual welder, there are times when you need to weld more quicklythan at a handheld speed. When the job goes beyond the small scale, affordableadd-ons like the MINIFLOOR drive unit can turn this tool into an automaticwelder. This attachment on wheels produces automatic welding results. Simplyattach the Triac ST to the MINIFLOOR to weld longer lengths with greataccuracy.

The Leister MINIFLOORweighs only 12 pounds, which makes it easy to transport. It is also the onlyautomatic welder that can connect with a hot-air hand tool in seconds. It alsoreduces the amount of time required to complete a product by almost half. Thiskind of accessory addition is unique to the Leister product line and it wascreated with the busy contractor on top of mind.

When you don't need a full-scale automatic welder but need to get through small projects and short joints, this is an excellent option for an upgrade. By including Leister products like this in your spray foam rig, you can maximize your abilities and save time.

Manual Hot Air Tools For Sale

Intech Equipment and Supply is a full-serviceequipment and parts supplier, including roofing and spray foam. If you wouldlike to know more about the Leister Triac ST or any other manual hot airwelders, then reach out to our team of experts today.

We're here to help you choose the rightproduct, make smart additions to your equipment.

Contact us.  Our team is ready to meet your unique equipment and accessory needs.

About Kevin Malone
Kevin Malone is a leading expert in the spray foam insulation industry with 34 years of experience in spray foam fluid handling and a passion for innovation. He currently offers his extensive knowledge to Intech Equipment and Supply customers by supporting them in selecting quality spray foam equipment to optimize their business. Learn more about Kevin here.


Intech Equipment & Supply was founded in 1995, and has since grown to become the leader in spray foam equipment, mobile spray foam rigs, and parts supplier. With locations all across North America we are available when you need us most.