The Professional's Choice for Welding Roof Membrane. The LEISTER TRIAC ST is the successor to the industry's leading TRIAC S and continues to set the standard for welding and joining various types of roof membrane using a hot air hand gun. The latest version of the TRIAC introduces some excellent new features which will make using the tool even easier. It's easy to clean filters and newly introduced ergonomic grip handle make using the tool a pleasure. The TRIAC ST completes the latest upgrades to the range of roof membrane welding tools still manufactured to this day in Switzerland, guaranteeing the Swiss quality professional roofers have been used to expecting. The TRIAC ST looks to continue the unique Swiss performance and ensures high quality results every time. The TRIAC ST comes as a gun in its case or is available as a complete roof membrane welding kit with the wide range of LEISTER nozzles, rollers and accessories used in roofing. Key Features Suitable for site work Manual t