Key benefits Reduces dust, drafts and wind to keep rooms cleaner and warmer. Improves sound insulation for a quieter living space. Conceals and seals window and door gaps for a neater appearance. Durable: resists cold, weather and aging while remaining flexible and non-deforming. Compatibility and sizes Works with plastic, aluminum and wooden windows, sliding window tracks, terrace doors and wooden doors that have a compatible groove. Two widths available: 0.62 in (16mm) width — fits gaps of about 0.55 in (14mm). 0.98 in (25mm) width — fits gaps of about 0.90 in (23mm). Important: measure the gap (nut) width of your window or door before selecting the correct size. Material and performance U-type profile made from silicone rubber for long-term flexibility and weather resistance. Cold-resistant, weather-resistant and aging-resistant properties help maintain sealing performance. Windproof and dustproof while also providing noticeable sound reduction. Easy installation Measure the gap size and required length. Clean dust and dirt from the groove. Press the U-profile strip into the groove until it sits securely. Trim excess with scissors for a clean finish. No special tools required; installation is quick and straightforward. Practical use scenarios Winter draft reduction: install on terrace doors or older windows to reduce heat loss and lower heating costs. Dust prevention for sliding windows: keep dust out of window tracks and improve sliding action. Noise reduction for street-facing rooms: add sealing to wooden or aluminum windows to reduce road and neighbor noise. This U-type silicone window seal provides a simple, durable way to improve insulation, reduce dust and noise, and give windows and doors a cleaner finish. Measure your gap carefully and choose the matching width for best results.