How to Repair Zippers That Separate or Come Undone — FixnZip®
zipper repair

Posted by & filed under Zipper Repair.

I have a favorite hoodie. It’s comfortable, all lined in fleece, and has an embroidered logo of my favorite NFL team. I wear that thing constantly during football season and through the winter until the weather warms up. Out of nowhere, the zipper stopped working. The teeth would separate as soon as I’d zip it up. The good news is, I fix zippers for a living, so I knew just how to fix it, and I’m going to share how you can easily fix your separating zipper, too.


Why is the zipper separating?

Most of the time, a zipper won’t stay zipped because there’s not enough tension in the zipper slider to connect the teeth correctly. It’s not easy to diagnose because you can’t tell just by looking at the zipper slider that it has lost tension. But you know something’s wrong when your zipper separates as soon as you zip it up.


How can I fix it?

When a zipper slider loses tension, the slider needs to be replaced. There’s not an easy way to put a new slider on a zipper, so you usually need to take out the entire existing zipper and put in a new one. This is a waste of a perfectly good zipper, and it’s not cheap to have done, either.


Enter the FixnZip. Its’ a replacement zipper slider and you don’t need tools or sewing to install it. The unique thumbscrew design allows you to fit the slider right over the existing zipper teeth and adjust the tension so your zipper always stays closed, no matter if the zipper is metal, nylon, or plastic, tooth or coil. Check out this video to see how it’s done:



Does it work on other zippers?

In the video, I showed you how to fix a separating zipper on a jacket, but the FixnZip works on other zippers that won’t stay zipped, like on a tent, backpack, or sleeping bag. The only difference is that those have closed-end zippers, so installing the FixnZip is just a little different. We have a video showing you how to fix a closed-end zipper here.


What size should I use?

A quick note on sizing. The FixnZip comes in small, medium, and large, which covers just about every zipper out there. I used a size medium FixnZip in the video to fix the separating zipper on my hoodie, which would be the same size you’d use on a sleeping bag or tent. See the sizing page on our website to find the right size FixnZip to fix your broken zipper. You can buy the FixnZip on our online store or at one of our retailers.


If you need any tips on fixing a zipper that won’t stay zipped or have questions I didn’t answer in the video, just shoot us a message on our contact page.