OSI - Henkel 1022835 WINTeQ Flash Rubberized Asphalt Window Flashing, 4-inch x 100 feet It is efficient, easy to use and provides excellent moisture and air infiltration protection in exterior wall assemblies It can also be used to seal doors and similar gaps and openings It will adhere to most common building substrates including vinyl, wood and concrete It is also useful for other above grade wall flashing applications Highly durable, resists damage and tearing Self-healing, easy to conform and shape