➤ Why are seam finishes like seam-taping or welding critical for waterproof outerwear?
Seam taping, heat sealing, and hot-melt adhesives block water entry through needle holes and along stitch lines. For waterproof breathable jackets, fully tape or weld critical seams and verify with hydrostatic head and soak tests. DWR coatings repel surface water but do not seal sewn seams, so proper sealing is essential for reliable rain performance.
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