Speed Bead by Amico features the latest in dual extrusion technology. This versatile casing bead trims out fenestration and other cladding breaks in less than half the time of traditional methods. The integrated expansion flange provides an even, self-adhesive gasket that adheres to the window or door creating a seal that does not need to be caulked, so you get a perfect seal every time. The flexible self-adhering gasket creates a permanent seal that moves with the opening as the structure settles through seasonal cycles.