Choosing between handheld plastic extrusion welders usually comes down to whether you prioritize maneuverability in tight spaces or maximum weld output for larger fabrications. Two options on the table are the LST600A and the Weldy EX3. Both are new units with listed prices close to each other, but they aim at different work patterns.
Quick verdict For small repairs, corner joints, and confined spots, the LST600A makes a solid case: a lower listed price, a 7 kg weight, and a design that highlights narrow-gap access. For civil engineering, membrane welding, and high-volume work, the Weldy EX3's higher extrusion output and dual-side rod feed give it an edge.
Comparison snapshot
| Feature | LST600A | Weldy EX3 |
|---|---|---|
| Listed price | USD 1,782.95 | USD 1,877.40 |
| Listed extrusion output | 2 kg/H | 3.4 kg/hr / 7.5 lbs/hr |
| Listed power | 1100W extrusion, 1600W hot wind, 800W electrode heating | 3000W unit |
| Welding materials | HDPE, PP, PVDF | PE, PP |
| Handling extras | Digital display controller, different angle welding heads | Three handles, lockable drive button, dual-side rod feed |
Where the LST600A stands out: It carries the lower of the two prices and a 7 kg weight, with a digital display controller, different angle welding heads, and a focus on narrow gaps and corners that are hard to reach. It also lists PVDF along with HDPE and PP as compatible materials.
Where the Weldy EX3 stands out: The EX3 offers a higher listed extrusion output of 3.4 kg/hr compared with the LST600A's 2 kg/H, and a 3000W unit. Its three-handle design and dual-side rod feed make it easier to work in tight spaces from different positions. The application list includes plastic fabrication, civil engineering, agriculture, construction, and membranes.
LST600A Plastic Extrusion Welding Machine
The LST600A weighs 7 kg and is designed for close-quarters work. Its 20-600°C adjustable hot wind range gives flexibility across different plastics. It runs on 220V/50Hz, so it is not a 110V unit. The 2 kg/H extrusion rate is modest, but a digital display and different angle welding heads help with seam work in tight spots. For HDPE, PP, or PVDF jobs in hard-to-reach joints, this is the lower-priced option at 7 kg, aimed at access and control.
Weldy EX3 Plastic Extrusion Welding Machine
The Weldy EX3 is the higher-output choice. It lists a 3000W unit and an extrusion rate of 3.4 kg/hr (7.5 lbs/hr), making it a good match for long membranes and civil or agricultural welding tasks. It is suited to PE and PP thermoplastics. The three-handle layout includes a lockable drive button, a rotating rear handle, and a side handle for left- or right-side mounting. Rod feeds in from both sides, which helps in confined spaces. The trade-off is the higher USD 1,877.40 listed price.
Final choice by use case Go with the LST600A if you want a lower-priced extruder for repair work, corner joints, and other tight-access jobs, and your material list includes HDPE, PP, or PVDF. Go with the Weldy EX3 if you need higher throughput for larger PE/PP welding projects such as membranes, construction, or agricultural applications, and you can use the extra 3.4 kg/h output to move jobs along.
