TESA-4957-19 is a type of Tesa tape used for electro-mechanical mounting and joining. It is made from transparent polyethylene terephthalate and is coated with an acrylic-based pressure sensitive adhesive. It has a thickness of 19 microns and a width of 48 mm. It is resistant to water, humidity, and UV-light, making it suitable for outdoor use and long-term bonding. The adhesive layer on this tape is designed to securely bond with many surfaces including metals, plastics, textiles, etc. It is often used for splicing, sealing, and bonding of cables and electrical components.