Leister Wide TRIAC Nozzle for Hot Air Welding, 20 mm or 40 mm Wide-Slot

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Leister Wide TRIAC Nozzle for Hot Air Welding, 20 mm or 40 mm Wide-Slot


The Leister Wide TRIAC Nozzle is a wide-slot overlap nozzle for TRIAC hot air tools with a 1.24 in. diameter nozzle connection. Available in 20 mm and 40 mm widths and sold per piece, it speeds up overlap welding on single-ply membranes, tarpaulins, tents and other fabric work.


Key Features:

  • Wide-slot design: A wide-slot, straight overlap nozzle that heats a broader weld area than a standard round tip.
  • Two widths available: Offered in 20 mm and 40 mm slot widths so you can match nozzle width to the weld.
  • Fits 1.24 in. tools: Designed for hot air blowers with a 1.24 in. diameter connection, such as the TRIAC series.
  • Roofing and fabric use: Used by roofers for membrane work and in textiles for repairs to truck tarpaulins, tents, blinds and marquees.
  • Production tacking: Also used in process heat applications for tacking on production lines.

Specifications Table:

Specification Details
Brand Leister
Sell unit 1 nozzle, per piece
Product line Leister wide-slot nozzles
Available sizes ['20 mm', '40 mm']
Dimensions 20 mm or 40 mm wide slot
Material Metal nozzle (hot air welding accessory)
Intended use Overlap hot air welding on membranes, tarpaulins and textiles; tacking in process heat
Category Tools & Equipment / Heat Tools

Fit and Compatibility:

Fits Leister hot air tools with a 1.24 in. (approx. 31.5 mm) nozzle connection, such as TRIAC series heat guns. Choose the 20 mm nozzle for narrower welds and the 40 mm nozzle for wider overlap welds; press roller sold separately.


Frequently Asked Questions (FAQ):

Q: What is included in the order?
A: One piece: a Leister Wide TRIAC Nozzle in your chosen 20 mm or 40 mm size.


Q: Which size should I choose?
A: Use the 20 mm nozzle for narrower or detailed overlap welds and the 40 mm for wider overlap work on membranes and fabric.


Q: Will it fit my heat gun?
A: It fits hot air blowers with a 1.24 in. diameter nozzle connection, which is the TRIAC series connection.


Q: What materials is it used on?
A: Roofing membranes, truck tarpaulins, tents, sun protection blinds and marquees, plus tacking tasks in process heat production.


Q: Does it come with a pressure roller?
A: No, a pressure roller is a separate accessory and must be ordered separately.


Expert Verdict — Reviewed by the SuperArbor Pro Desk

Wide-slot nozzles let you heat the full overlap area evenly so you can run a continuous weld without scorching narrow strips. Pick the 40 mm for single-ply overlap welding where speed matters, and the 20 mm for repairs and tighter detail work. Always test temperature and travel speed on scrap material from the same membrane roll first.

Nozzle tips stay extremely hot during and after use; allow cooling before touching or changing nozzles and keep flammable materials clear of the air stream.


Upgrade your overlap welding with a Leister Wide TRIAC Nozzle in 20 mm or 40 mm today.

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All orders are reviewed before fulfillment. You are not charged until your order is approved and ready to ship — and you may cancel at any time before that at no cost.

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