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Overview
Waterproof zippers combine a coated or laminated tape with a sealed chain to stop water ingress at the seam. Performance depends as much on the seam-sealing method and coating as on the zipper itself, so the construction must be agreed before bulk production.
Production Notes & QC Checkpoints
What decides whether this product performs in the field — and what to verify before each shipment:
| Checkpoint | What goes wrong | Verification |
|---|---|---|
| Coating integrity | A coating that cracks at the fold line leaks. Test the coated tape with repeated flexing before bulk approval. | Flex test + water-column test on the coated tape |
| Seam sealing compatibility | The zipper must match the sealing tape and heat/pressure used by the fabricator. Mismatched sealing is the most common leak path. | Trial seam seal on production equipment |
| Slider seal design | Water can enter at the slider even when the chain is sealed. Confirm the seal design and the expected water pressure. | Spray / water-column test at the stated pressure |
| Abrasion at the fold | Repeated opening at the same point wears the coating. Confirm the expected cycle count. | Cycle test at the fold point |
| Cold-flex performance | Coated tape stiffens in cold weather and can crack. State the minimum service temperature. | Cold bend test at the stated temperature |
Buyer FAQ
Q1. How is waterproof performance measured?
Usually by water-column pressure (mm) or by a spray test on the finished seam. State the value you need, and confirm whether it applies to the zipper alone or the sealed seam.
Q2. Can I seal it on my own equipment?
Yes, provided the sealing tape and parameters match the coating. We recommend a trial seam seal on your production equipment before bulk.
Q3. Which is better: coated tape or a laminated membrane?
It depends on the required pressure, the fabric and the sealing method. Send the construction and the target pressure and we will advise.
Q4. Does it stay flexible in cold weather?
Coated tapes stiffen at low temperature. Tell us the minimum service temperature so the coating can be selected accordingly.
Q5. Is the zipper still waterproof after many cycles?
Performance at the fold point degrades with cycles. Specify the expected cycle count and we will confirm the test method.
Quick Reference Card
- Water-column / spray target stated
- Coating flex test passed
- Seam-seal trial on your equipment
- Slider seal design confirmed
- Cold-flex temperature specified
Request a Quotation
Send your specification — material, size, colour, quantity and any standard or test report you require. Our team will confirm feasibility, sampling and lead time.
