Wool Pile (Weather Stripping)

Wool pile, also known as weather stripping or window brush, is a flexible sealing material made from dense woven polypropylene fibers attached to a durable backing strip. It is specifically designed for sliding aluminum and U-PVC windows and doors, where it fits into dedicated grooves within the frame profiles. Wool pile works as a soft, friction-resistant barrier that helps prevent dust, air leakage, insects, and unwanted noise from entering through the gaps between sliding panels. It improves indoor comfort by reducing the entry of outdoor dust, pollution, and sand particles, helping keep interiors cleaner. The soft fiber structure also absorbs vibrations between moving window sashes and tracks, reducing rattling sounds caused by wind pressure or movement. Additionally, wool pile improves energy efficiency by minimizing air leakage from window gaps, helping maintain indoor cooling from inverter AC systems and reducing unnecessary energy consumption. Different types are available depending on the window profile requirements, including standard brush wool pile and fin-seal wool pile, which features an additional flexible plastic fin through the center of the fibers to provide enhanced air sealing and improved resistance against wind-driven rain. Wool pile is an essential component for modern sliding window systems, providing better insulation, smoother operation, and long-term protection against environmental elements.