Guttaprofil U-type polycarbonate end closure designed for tight sealing and flanging of hollow polycarbonate plates. Guttaprofil polycarbonate ending U designed for tight and tight sealing and edging of hollow polycarbonate sheets . For proper sealing of the polycarbonate plate, it is necessary to first coat the cover with a ventilation sealing tape and then fix it with a U-profile. The tape prevents the wadding into the hollows of the board, so that no dirt is formed and no algae. The bar is a universal accessory and can be easily used to trim all of the hollow polycarbonate slabs.