How to Fix a Broken Zipper. The zipper on my coat goes up but not down. How do I fix it? wikiHow Contributor Rub the zipper with a bar of soap. This is a easy way to fix a zipper without replacing it. This method is really fast too. It works when the zipper pull doesn't close the zipper together anymore. I don't really like to replace zippers, because they always come out a little bit wavy when I do it myself. You can save a jacket, a tent repair replace broken zipper slide PovertyLabs. How to Fix a Zipper and Put a Slider on to Zipper How To Replace A Coat/JacketZipper 2 Having a broken zipper on your jacket can be incredibly annoying, but now you can fix it right up with this super simple zipperrepair. How to Fix a Zipper on a Jacket - Life Hack Have you ever had a favorite jacket and the zipper just stopped working? You start to zip it up and the sides jus When your zipper is stuck it feels like it's getting caught on something. The zipper might not come down at all, and until you fix it you're stuck inside your jacket. When a jacket won’t zip properly, the slider is often to blame. Learn how to repair a worn out zipper slider, plus a few quick fixes. Shaisa on Mar 07, 2018: My zipper is good but the piece at the bottom of the coat that you insert the zipper fell off because that section has frayed. Thankfully i have the piece, how do you repair the frayed material. When purchasing a leather jacket, consider the garment an investment you will enjoy for years. A broken or non-functional zipper is a disappointment because it renders the jacket unusable long before it is shabby or out-of-date. If you learn the mechanics of a zipper you can easily learn how to fix a zipper on a jacket in no time. All that is needed to fix a zipper on a jacket is a minor adjustment to the slide and a little lubricant.