Dog Bed Zipper Broke? Fix It Without Sewing a New Cover
Most broken zippers need the slider squeezed back into shape or swapped for a new one. Fix yours in 10 minutes and keep the cover.
By Jamilur Rahman Updated November 5, 2026 · 7 min read
- Time
- 10 min
- Cost
- Under $20
- Difficulty
- Easy
In this guide
Quick answer
To fix a dog bed zipper, first work out what failed. If the teeth split open behind the slider, squeeze the slider gently with pliers to tighten it. If the zipper is stuck, rub graphite or soap along the teeth. If the slider is cracked or missing, replace it with a new slider that matches your zipper size. A zipper repair kit with replacement sliders covers all three, and you keep the cover.
Free fix vs. permanent fix
Tighten the slider with pliers
- Zip down past the split and check that both rows of teeth line up and nothing is caught
- Pinch the slider gently with pliers, a little at a time
- Rub a pencil or a dry bar of soap over stuck teeth
- Test it a few times before you refill the cover
How long it lasts: Weeks to months. A worn slider opens up again as it keeps stretching.
A new slider from a zipper repair kit
A zipper splits when the slider has stretched and no longer squeezes the teeth together. Pinching it back works for a while, but the metal keeps stretching. A new slider restores the grip and costs a few dollars, so you keep the washable cover you already own.
What to get: Zipper repair kit with replacement sliders
How long it lasts: Years. A new slider grips the teeth like the original did.
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What you'll need
-
Needle-nose pliers
For pinching the slider and pulling off the stop
You have it -
Graphite pencil or dry bar of soap
To free stuck teeth
You have it -
Needle and strong thread
To sew a new bottom stop if your kit does not include one
You have it - Our pick Illustration
Zipper repair kit with replacement sliders
Has several sizes plus stops, so you can match yours
- Illustration
Single-size replacement zipper sliders
Only if you know your zipper size
- Illustration
Heavy-duty zipper by the yard with sliders
For missing teeth or torn tape
Why it happens
A stretched slider
Each zip pulls the slider open a tiny bit. After years of use the gap is too wide, the teeth stop locking behind it and the zipper splits open again.
A bulky insert straining the cover
Dog bed covers fit tight around thick foam. The zipper is pulled sideways each time you close it, which wears the slider and can pop teeth out.
Fur, dirt or dried detergent
Hair and grit jam the teeth, and dried detergent makes them stick. A jam forced shut bends the slider.
A missing tooth or torn tape
If teeth are missing, or the fabric tape has torn away from the teeth, no slider will hold. That needs new zipper tape or a stitched seam.
Try this first (free)
Do these in order, starting with the simplest.
-
1. Look closely at the zipper
Zip it down and check the teeth. Are both sides complete? Is any tape torn or a tooth missing? Is the slider cracked? What you find tells you which fix to use.
-
2. Clear out hair and grit
Brush the teeth with an old toothbrush and wipe them with a damp cloth. Let the zipper dry before you test it.
-
3. Free stuck teeth
Tool used: Graphite pencil or dry bar of soapRub a graphite pencil or a dry bar of soap along both sides of the teeth, then work the slider back and forth. Do not force it. A hard yank can bend the slider or pull teeth out.
-
4. Re-seat a split zipper
If it springs open behind the slider, zip the slider down past the split so the teeth separate cleanly. Then zip back up slowly, holding the fabric flat.
-
5. Tighten the slider
Tool used: Needle-nose pliersWith needle-nose pliers, squeeze the slider's top and bottom plates together a very small amount, at the end where the teeth join. A tiny squeeze goes a long way. Too much and it jams. Test, and repeat if you need to.
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6. Replace the slider
Tool used: Zipper repair kit with replacement slidersIf squeezing no longer helps, pull off the bottom stop with pliers, slide the old slider off and thread a new one on. Fit a new stop or sew a few thick stitches in its place. Match the size and the type: coil, molded plastic or metal.
IllustrationCheck price on AmazonTool for this step
Zipper repair kit with replacement sliders · Has several sizes plus stops, so you can match yours
When free fixes aren't enough
Squeezing a slider is a quick fix and can hold for months, but the slider keeps wearing, and a hard squeeze can crack it. If the zipper splits again within a week or two, or the slider has cracked, replace it. A new slider is cheap and restores the grip. If teeth are missing, or the tape has torn away from the teeth over a few inches, a slider will not help. Then you need a new zipper section sewn in, or you can stitch that stretch shut and open the cover from another seam.
Buy the fix
Still stuck after the free fixes? These are the products we would look at.
| Pick | Product | Fixes | Who it's for | Buy |
|---|---|---|---|---|
| Best pick | Zipper repair kit with replacement sliders | a stretched, cracked or missing slider | Anyone whose zipper keeps splitting open or whose slider has broken. | Check price |
| Budget pick | Single-size replacement zipper sliders | a worn slider, at the lowest price | Owners who have read their zipper size and just want the part. | Check price |
| Upgrade pick | Heavy-duty zipper by the yard with sliders | missing teeth or a torn zipper tape | Owners comfortable sewing a straight seam, whose zipper is damaged beyond a new slider. | Check price |
Zipper repair kit with replacement sliders
Fixes: a stretched, cracked or missing slider
Look for: Sliders in several sizes, including the heavier ones used on bulky covers; Top and bottom stops, which you need to finish the repair; Coil, plastic and metal types if you are unsure of yours; Clear size labels you can match to the number on your slider.
- Who it's for
- Anyone whose zipper keeps splitting open or whose slider has broken.
- Honest downside
- The teeth are missing or the tape is torn. A slider will not fix that.
Single-size replacement zipper sliders
Fixes: a worn slider, at the lowest price
Look for: A size that matches the number stamped on the back of your slider; The right type: coil, molded plastic or metal; Matching pulls and stops, or buy the stops too.
- Who it's for
- Owners who have read their zipper size and just want the part.
- Honest downside
- You cannot find the size on the old slider. Get the kit so you can match it by trial.
Heavy-duty zipper by the yard with sliders
Fixes: missing teeth or a torn zipper tape
Look for: The same type and size as your original zipper; Sliders and stops included; Enough length to cover the full opening plus a few inches.
- Who it's for
- Owners comfortable sewing a straight seam, whose zipper is damaged beyond a new slider.
- Honest downside
- Only the slider is bad. A new slider is enough.
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How we picked: How we picked: this page is based on zipper-repair guides from sewing and clothing-care sources, zipper sizing charts, and what dog owners report in reviews of repair kits. We do not test products by hand.
How to read your zipper size and type
Flip the slider over and look at the back. Many are stamped with a number, and that number is roughly the width of the closed teeth in millimeters. Then look at the teeth. Coil zippers have a spiral of thread, molded plastic zippers have chunky individual teeth and metal zippers have shiny teeth. The new slider must match both the size and the type.
Keep the new zipper working
- Zip the cover closed before you wash it, so the teeth do not snag.
- Do not overstuff the bed or force a thicker insert into the cover.
- Close the zipper slowly, with the fabric held flat.
- Brush fur out of the teeth every few washes.
What to skip
Forcing the slider or gluing the teeth shut
Yanking a stuck slider bends it and rips teeth out. Glue locks the zipper shut so the cover can no longer come off for washing. Free the teeth with graphite and go gently.
Frequently asked questions
Why does my dog bed zipper keep coming undone?
How do I know what size zipper slider I need?
Can I use a paperclip or safety pin until the parts arrive?
Do I need to sew to replace a zipper slider?
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