Our U-Stay Dry Zippers are designed for a Splash-Proof tolerance.
We do not commit to them being waterproof!
That being said, the teeth are not exposed and the manufacturing process allows for a recessed rubber (PVC) slot to receive the actual sliders casing, which then affords a 'Seal' The opening is 16.5 cm in Closed Ended Function.
The zippers overall length being 22.5 cm and its 3cm wide. We strongly suggest that the zipper is not sewn and holes are not punctured into its very high tech membrane. (The zippers membrane is a high tech residual coating.) Sealing and/or placement should be by way of a therm-o-welding bonding applicator 140 Degrees at MINIMUM!
Not Guaranteed as Watertight!