Sarnafil Inc., Canton, Mass., announces the introduction of the Sarnamatic 661 automatic hot-air welder. This model replaces the Sarnamatic 641 and is the next generation in hot-air welding machines. An adjustable nozzle allows the device to weld both field seams and perimeter edges. The machine is adaptable to perform single and double welding as well as welding profiles for the Décor Roof System, a feature unique to the 661. Welding parameters for Sarnafil membranes are stored in internal memory, available at the touch of a button. The welder also has an advanced air trap for crease-free and wrinkle-free seams.