Automotive Wire Harness Tape 0.4mm Laminated PET Nonwoven Engine bay harnesses fail at the rub points long before they fail electrically. This 0.4 mm tape bonds a woven PET face to a polyester non woven cushion, so the wrapping both slides and cushions against a sharp bracket edge at 150 C. The laminated structure is why it is dedicated to the engine bay: the PET face takes the scraping action, the non woven layer absorbs the shock, and the high temperature acrylates adhesive