This specialized barrier typically consists of a flexible PVC or rubber material shaped with a protruding fin. This fin inserts into a groove or channel in a corresponding door or window frame, creating a tight seal against air and moisture infiltration. An example application is its use in automotive door frames to reduce wind noise and prevent water leaks.
Effective sealing against the elements is crucial for energy efficiency, comfort, and the prevention of structural damage in buildings and vehicles. By minimizing air leakage, this type of seal contributes to lower heating and cooling costs, reduces drafts, and helps maintain a consistent interior temperature. Historically, simpler methods like felt or foam were used, but advancements in materials science and design have led to more durable and effective solutions like this specialized fin-based seal.