Waterproof Zipper: Waterproof Zipper (防水拉链)
A zipper that uses a coated or laminated tape and a sealed slider to limit water penetration through the closure. TPU or PU film on the tape creates a continuous barrier, and the slider body may include a gasket. These zippers are used in outerwear, marine covers and protective gear. Performance is measured by hydrostatic pressure testing, and the seam where the zipper meets the garment must also be sealed.