Lastly, the strips of fabric are permanently bonded to each other with specialised, durable PTFE (Teflon-coated) sewing threads, such as Tenara in plain white, or with ultra-modern adhesive technology. Depending on the quality of the fabric, welding can also be used as a means of processing. This involves permanently welding the joining seams as well as the hems in a horizontal direction. UltraSeam is another processing option. Here, the strips of fabric at the cut edges of the awning fabric are aligned and joined together with the UltraSeam Tape (butt joint tape).