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I have a Patagonia Duffel bag with a stuck zipper. It isn't stuck with material in the teeth. The zipper is plastic but looks as if it has corroded a bit and has seized. What is the best way to unstick this zipper? |
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WD40 works on zippers too, but if stuck near the bottom it could be worthwhile cutting away the zipper stops to free it, then oversewing (with button thread) from the end to the newly-made stop. link |
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A bar of soap would do a similar job to candle wax. Rub the bar along the zipper for lubrication. Also try visiting a shoemaker. They can stitch a new zipper replacing your old one. They usually have these brutal stitching machines that handle most materials quite easily. link |
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If the zipper is jammed closed to an end, try using a pair of pliers to remove the zipper stops on one side. With some luck and patience, you can pull that side completely off through the slider, reset the zipper, and then replace the zipper stops. link |
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If you can get it moving, try working in candle wax (rub a candle along the zipper) and move the tag back and forth. Good luck! link |
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I had great success with badly stuck zippers (showing a apparent corrosion) soaking the zipper in Coca Cola. link |


This isn't the best way to fix the stuck zipper, but I know for a fact that Patagonia will repair/replace your duffel for free due to their stellar return policy.