For over 35 years, we have been serving the Swiss territory and the Principality of Lichtenstein with the high-quality LEISTER product range. Please visit www. jannone.ch you will find there our devices for professionals. With the brand WELDY, we now also have a cost-effective sorting for everyone. You can easily make purchases via our online shop. If you are only working periodically with hot air or if the devices are only used for smaller work, then the affordable version with the WELDY products is just right for you. But if you need the hot-air appliances for complex daily applications, we recommend you our high-quality professional devices LEISTER and advise you at any time gladly.

WELDY, a brand of LEISTER

Our products are ideal for the industrial and the construction sector (pipe welding, roof waterproofing, etc.) as well as manufacturers of plastic containers, waterproofing companies, floor mats (vinyl, PVC) and also for suppliers of tarpaulins. The devices are used for numerous application possibilities from the fixing of advertising placards over the swimming pool production and sealing of water tanks to the furniture restoration. It also has the right do-it-yourself line for the hobbyist with little practical plastic welding experience, who likes to repair damaged plastic parts by himself or to do handicraft work with plastic materials. For every application, we offer the right solution including all necessary accessories such as scrapers, pressure rollers, nozzles, etc. We supply our customers from Switzerland and the whole world.

WELDY Product portfolio

  • Hand extrusion welders
  • Hot-air guns for „private label“partners
  • Hot-air guns for „Do-it-yourself" markets
  • Hot-air tools for universal uses and for shrinking
  • Automatic Welding tools for the Roofing industry
  • Automatic Welding tools and welding machines for the tarpaulins and billboard Industries


The Welding Solution - simple. good. affordable. WELDY started its business activities in 1997 to complement the Leister Product Portfolio with simple Hot-air-Guns to serve the “Do- it-Yourself” markets as well as to enable business opportunities with “Private Label “partners. Already in 2004 WELDY enlarged its product portfolio by including functional plastic welding tools to serve the local requirements in China as well as to expand into “Emerging Markets” and selective countries. Since 2007, all Weldy products are manufactured according to the Leister standards for function and quality by Leister China. The location of Leister in Shanghai and its proximity to the key markets is a perfect match for Weldy to meet the customers’ requirements.Today, WELDY has expanded its activities in China to develop, design and manufacture new products to enhance and simplify the customers needs according to its slogan - simple. good. affordable.