Sievert Industries, Inc. has been manufacturing professional heating tools for the roofing industry since 1882. Sievert's product offering covers electronic hot air welding equipment, open flame torches, and premium soldering irons. The TW 5000 is the ultimate robotic welder used for seam welding of TPO, PVC, and modified bitumen. Sievert's goal is to provide its valued customers with excellent service, competitive pricing, and the highest quality tools for every heating application.