Purpose of 6.8mm x 6mm Woolpile in uPVC:

• Sealing Gaps in Sliding Systems: This is its primary application. In sliding windows and doors, there’s always a slight gap between the moving sash and the fixed frame (or between two overlapping sashes) to allow for smooth movement. Woolpile fills this gap.

• Dust and Insect Barrier: The dense fibers effectively block the entry of dust, dirt, and insects.

• Acoustic Insulation: Helps to reduce noise transfer.

• Draft Prevention: Minimizes air leakage, contributing to better thermal insulation and energy efficiency.

• Smooth Operation: The soft bristles allow the sash to slide easily without significant friction, while still providing a seal.

Understanding the Dimensions (6.8 x 6 mm):

• 6.8mm: This refers to the width of the rigid base of the woolpile, which slots into the groove in the uPVC profile. This measurement is crucial for proper fit.

• 6mm: This refers to the height of the “pile” or brush (the length of the fibers extending from the base). The pile height determines how effectively it fills the gap.

Variations of Woolpile:

• Siliconized: Many woolpiles are “siliconized,” meaning the fibers are treated with silicone oil. This significantly improves their water repellency, UV resistance, and durability, and reduces friction for smoother sliding. This is highly recommended.

• With Fin: Some woolpiles have a thin plastic fin (often polypropylene) running down the center of the brush. This fin provides an extra barrier against air and water, further enhancing sealing performance.

• Colors: Commonly available in grey, black, and sometimes white.