Perimeter isolation tape made of polyethylene foam, 5 mm thick and 20 cm in total height, equipped with pre-cuts for easy "L" folding. The vertical section of the tape (15 cm height) should be applied to the wall and is partially self-adhesive to allow easier trimming at the end of the work, while the horizontal section (5 cm height) is fully self-adhesive for more effective adhesion to the acoustic layer. The excess tape should only be trimmed after the installation of the final floor covering.