The Leister TRIAC AT is a digitally controlled heat gun for thermoplastic welding and forming. Set the temperature anywhere from 40 to 620 degrees and the digital control holds it there, even on site generators that would make a basic gun wander.
Eco-Mode and a 90-second cool-down shut-down protect the 1600W element, which is the difference between a gun that lasts years and one that burns out mid-season.
Frequently asked questions
Can the TRIAC AT be used with HDPE geomembranes on site?
Yes, the TRIAC AT is suitable for welding HDPE geomembranes. Use a setting around 580 °C with 200 l/min airflow and the correct nozzle. Always perform test welds to confirm optimal site conditions.
Does the AU model work with standard 10A site power in Australia?
Yes, the Australian TRIAC AT operates on standard 10A, 3-pin power outlets. It is rated at 230 V / 1600 W, compatible with typical Australian job site power supplies and RCD-protected circuits.
What nozzles are compatible with the TRIAC AT?
The TRIAC AT uses a ø31.5 mm nozzle connection designed for Leister accessories. This includes a range of slit, overlap, and tubular nozzles. M14 thread adapters are also available for specific legacy fittings.
How does Eco-Mode benefit site operations?
Eco-Mode reduces power consumption when the gun is idle. This feature lowers the element temperature, protecting the heating coil and extending the tool's service life without slowing down restart performance.
Is the TRIAC AT designed for continuous operation?
Yes, the TRIAC AT is engineered for continuous-duty use. Its built-in cool-down cycle and temperature stabilisation features ensure consistent performance for demanding tasks such as roofing and geomembrane welding.
Substrate guide
Using the correct preparation and temperature setting is critical for reliable plastic welding and forming.
PVC (Polyvinyl Chloride)
Surface prep: Ensure the surface is clean and dry. Wipe with a dry cloth; avoid any moisture.
Primer: Not required. Weld directly to the material. Target 500–580 °C with medium airflow using a suitable nozzle.
TPO (Thermoplastic Polyolefin)
Surface prep: Preclean surfaces with isopropyl alcohol to remove contaminants.
Primer: Not required. Weld directly using an overlap nozzle with consistent pressure. Target 520–600 °C depending on sheet thickness.
HDPE / LDPE (Polyethylene)
Surface prep: Clean with an abrasive cloth, then dry wipe to remove dust and debris. Avoid moisture.
Primer: Not required. Must use a matched HDPE welding rod if joining edges. Target 560–620 °C with high airflow.
Acrylic / Polycarbonate
Surface prep: Gently clean with an alcohol-based antistatic cleaner to prevent static buildup and dust attraction.
Primer: Not required. Use for forming only, not welding. Apply low heat at 360–400 °C to prevent material crazing or bubbling.
Leister Triac AT Heat Gun Physical Properties
| Property | Value |
|---|---|
| Voltage | 230 V |
| Power | 1600 W |
| Frequency | 50/60 Hz |
| Temperature Range | 40–620 °C |
| Temperature Setting | Stepless |
| Airflow | 120–240 l/min |
| Air Volume Adjustment | Stepless |
| Static Pressure | 3000 Pa |
| Eco Mode | Yes |
| Display | Digital e-Drive |
| Outdoor Use | Yes |
| Nozzle Connection | ø31.5 mm, M14 thread |
| Length | 335 mm |
| Device Diameter | 90 mm |
| Handle Diameter | 56 mm |
| Weight | 1.02 kg |
| Power Cable Length | 3.0 m |
| Noise Emission Level | 67 dB(A) |
| Protection Class | II |
| Plug Type | AU, 3-pin, 10A |
| Approvals | CE, S+ |
| Country of Origin | Switzerland |