In the field of PVC plastic welding — a material that demands high precision, strict temperature control, and excellent corrosion resistance — choosing a high-quality extrusion welder is the key factor determining weld quality, productivity, and equipment longevity. Leister, the leading Swiss brand in hot air and extrusion welding technology, introduces two outstanding models: Weldplast S1 and Weldplast S2 PVC. These are specially designed for welding PVC-U, PVC-C, and other rigid plastics. Below is a detailed analysis of their superior features.
1. Weldplast S1 – Compact, Versatile, Perfect for All Projects
The Weldplast S1 is the ideal choice for those who need a lightweight, easy-to-handle machine that still delivers professional weld quality on PVC sheets from 4–12 mm thick.
- Ergonomic Design at Its Best: Dual-component non-slip grip, weighing only 4.7 kg, comfortable for extended use without fatigue. The welding rod feeder (3–4 mm) can be loaded from either left or right side without twisting, offering maximum flexibility in any position.
- Outstanding Performance for PVC: 1600 W power (230 V), output up to 0.8 kg/h for HDPE and significantly higher for PVC (up to 1.15 kg/h). Separate control of air temperature and plasticizing temperature (two-circuit system) ensures stable, burn-free, and deformation-free welds on PVC.
- Smart Features: Built-in LED work light, safe hanging hook, freely adjustable air flow. Compatible with nearly all common plastics: HD-PE, LD-PE, PP, PVC-U, PVC-C, PVDF, ECTFE, PA, etc.
- Key Advantages: Extremely compact and portable for on-site work, perfect for detailed welding, repairs, installation of water pipes, chemical tanks, and PVC roofing sheets. Delivers beautiful and highly durable welds from the very first use.
With the Weldplast S1, you have a lightweight yet powerful companion that boosts productivity while ensuring absolute safety when working with PVC.
2. Weldplast S2 PVC – The “King” of Specialized PVC Welding, High-Performance Premium Model
If the Weldplast S1 is the “skilled craftsman,” then the Weldplast S2 PVC is the “super machine” dedicated to projects requiring maximum speed and durability.
- Fully Optimized for PVC: The special PVC version features superior corrosion resistance — electronics are completely sealed, and metal parts are specially treated to withstand HCl gas (hydrochloric acid) generated during PVC welding. This is a major difference compared to standard machines, making the S2 PVC many times more durable in harsh PVC welding environments.
- Impressive Power: 3000 W power, output up to 2 kg/h (4.4 lbs/h) — nearly double that of the S1 — ideal for PVC sheets from 4–20 mm thick. Precise and continuous temperature control, flexible air flow and rod feed speed deliver uniform, strong, and highly aesthetic welds.
- Smart & Versatile Design: Sleek arrow-shaped body for easy access to tight corners. The welding shoe rotates 360° freely and can be mounted in any position. Multiple grip options make it extremely comfortable for long working hours.
- Outstanding Advantages: Welding speed is up to twice as fast, significantly reducing project time. Extremely durable with minimal maintenance, perfect for industrial production, chemical tank fabrication, large drainage systems, and PVC composite sheets. Achieves the highest weld standards even with rough PVC or PVDF.
The Weldplast S2 PVC doesn’t just weld PVC — it conquers PVC with absolute perfection.
Quick Comparison & Why You Should Choose Leister Weldplast
| Criteria |
Weldplast S1 |
Weldplast S2 PVC |
| Power |
1600 W |
3000 W |
| Output |
0.3–0.8 kg/h (higher with PVC) |
1–2 kg/h (up to 2.5 kg/h) |
| Sheet Thickness |
4–12 mm |
4–20 mm |
| PVC Specialization |
Good |
Excellent (corrosion-resistant) |
| Weight |
4.7 kg (ultra-light) |
5.8 kg (still compact) |
| Applications |
Versatile, detailed work |
Industrial, high-speed production |
Both models share these premium features:
- Swiss-made quality — exceptional durability and absolute temperature stability.
- Precise control, user-friendly operation, minimizing operator errors.
- Energy and material savings, reducing long-term operating costs.
Leister doesn’t just sell machines — it delivers professional PVC welding solutions that help your business increase productivity, minimize waste, and confidently tackle any project.
Are you looking for a high-quality PVC welding machine?
- Weldplast S1 is perfect for small workshops and flexible repairs.
- Weldplast S2 PVC is designed for large-scale production demanding maximum speed and durability.
Contact your authorized Leister distributor today for free consultation, live demonstration, and special offers!
Leister – Swiss Quality, Vietnamese Value. PVC welding has never been easier or more perfect!
