3M 8520 Matte Edge Sealer tape is a pressure sensitive, optically clear tape with a clear polyester liner used to seal vehicle perforated window graphics and for sealing cut edges and seams on watercraft graphics, car and truck Wraps.

The tape minimises the adverse effects of rigorous use or prolonged or severe exposure conditions by providing water and contaminant-tight seal between a graphic film and substrate. It is required for some 3M warranted graphics (refer to the base film's Product Bulletin for details).