Enviro-Dri Pan & Arch is a multi-directionally flexible, cold-applied self-adhering membrane composed of butyl rubber with a creped, cross-laminated polyolefine liner. This product conforms easily and effectively to curved substrates. Because of its unique design, Enviro-Dri Pan & Arch provides an air- and moisture-tight seal and eliminates the need for corner flashing patches. Enviro-Dri Pan & Arch fully integrates with the Enviro-Dri Weather Resistant Barrier System to provide you with the next level of protection against air and moisture intrusion.