TW Moisture Wrap is a flexible, 40-mil, self-adhering, rubberized asphalt sheet membrane with a polymer film on the surface and a removable treated release film on the adhesive side. TAMKO TW Moisture Wrap is designed for use as an above-grade moisture/air barrier and is suitable for application in cavity-wall construction, sealing window and door perimeters, sealing of wall joints, corners and other terminations.