Sliding Window Brush Seal and Pile Weatherstripping

Every sliding window needs a seal that closes the gap without stopping the sash from sliding. Rubber gaskets press against the glass or frame; a brush seal does the same job with flexible PP yarn pile, so the sash can move along the track while dust, air, light and insects are kept out.

This page covers brush seal for sliding windows in general: replacing the strip in existing windows, supplying window accessory shops and stocking common sizes for aluminum and UPVC sliding frames. If you are an aluminum profile system company working from drawings for each slot, see the aluminum window brush seal page.

Aluminum profile system? See aluminum window brush seal

Final base width and pile height follow the groove and the gap of the actual window.

Sizes are written as base width x pile height. These combinations appear often in sliding window orders; they are a starting point, not a stock list.

How to measure base width and pile height

Start from what the window uses now. Regular pile suits ordinary gaps and is the usual repeat choice. Siliconed pile is chosen when the sash feels stiff or the window faces sun and rain. Finned pile adds a center fin when dust, wind or water still come through a regular strip.

A typical sliding window uses brush seal along the sash perimeter, at the interlock where two sashes overlap and sometimes on the insect screen frame. Positions can use different sizes, so measure or photograph each one when replacing.

• Sash perimeter against the frame track
• Interlock or meeting rail between sashes
• Insect screen frame
• Sliding balcony doors with the same system

Compare the pile types and sizing guides below before sending an RFQ with the old sample photo, sizes and quantities.