I've only seen this twice and it seemed so peculiar. I wasn't really sure if this is some sort of factory defect or if the wrong kind of material was used. This black goo looks like the peel-and-stick flashing they put around windows.īoth cases were about 5-year old homes at the south exposure.īoth homes were a fairly dark color and I assume this is the tar or mastic that was melting from the excess temperatures they are exposed to. This gives them more time to focus on other construction projects worry-free.īostik formulates butyl adhesives designed to address flashing tape needs.I saw this for the 2nd time this week and I'm not sure what the exact cause is. This is especially important as many contractors deal with labor shortages and limited resources.īutyl flashing tape adhesives help improve tape ease of use, making installation faster and more efficient for workers. This helps flashing tape increase its ability to protect the building envelope.Īs new construction and renovation demand rises, flashing tape that boosts productivity becomes essential. With good product stability, butyl flashing tape adhesives offer aggressive tack and consistent performance. The right flashing tape adhesive can also aid in that. Therefore, it’s imperative that flashing tape offers superior durability and longevity. In addition to windows, doors and roofs, flashing tape is seeing increased use in: Enhanced ability to maintain tackiness at temperature extremes.Butyl adhesives in particular offer good high temperature tolerance for the following reasons: The flashing tape adhesive can largely determine how well the tape can withstand high temperatures. If it is unable to maintain performance, the overall building envelope integrity will likely suffer. This is because flashing tape is used outside and exposed to extreme temperatures over an extended period of time. High temperature tolerance is increasingly important in today’s flashing tape market. Find out how butyl flashing tape adhesives keep up with application needs. As the flashing tape market expands, seeing increased use in windows, doors and roofs, it’s important to understand the role adhesives play in achieving proper tape performance. In recent years, flashing tape has become a requirement for achieving optimal building envelope tightness.

Flashing tape for windows