Abstract: The present disclosure describes systems and techniques for sealing over fasteners coupled to exterior building enclosures, including discrete adhesive patches, as well as various dispenser systems thereof. In some examples, a system includes a system for sealing over fastener heads coupled to one or more building enclosure layers, the system comprising an elongated release liner wrapped into a cylindrical roll. In some examples, the system includes a plurality of circular fastener patches distributed longitudinally along the release liner, each fastener patch comprising. According to some embodiments, the plurality of circular fastener patches includes a conformable air-tight and water-tight film layer. The plurality of circular fastener patches may include a pressure-sensitive and hydrophobic adhesive layer disposed between the film layer and the release liner.