Common Zipper Problems and Fixes

Problem 1: Zipper Is Stuck and Will Not Move

  1. 1

    Lubricate the teeth

    Run a graphite pencil along both sides of the zipper teeth — graphite is a dry lubricant that frees stuck zippers immediately. Alternatives: a bar of soap, lip balm (Chapstick), wax candle, or a drop of olive oil on a cotton bud. Work the zipper back and forth gently after applying lubrication. Avoid WD-40 on fabric — it leaves oil stains.

  2. 2

    Check for fabric caught in the teeth

    Look carefully for a thread, lining fabric or material caught between the teeth and the slider. Use a pin or seam ripper to carefully free the obstruction. Gently pull the fabric back from the zipper while moving the slider slowly in the opposite direction.

Problem 2: Zipper Separates (Teeth Open Behind the Slider)

  1. 3

    Squeeze the slider with pliers

    The slider has two plates that grip the zipper teeth and link them together as it moves. If those plates become too wide (from wear), the teeth do not fully interlock and separate behind the slider. Solution: grip the slider with needle-nose pliers and squeeze very gently to slightly narrow the gap. Test the zipper after each squeeze — over-squeezing makes it too tight to move. This fix works on most separating zippers and takes 2 minutes.

Problem 3: Zipper Pull Has Broken Off

  1. 4

    Thread a replacement pull through the slider

    A paperclip, safety pin, key ring or shoelace threaded through the slider hole makes a functional replacement pull. Purpose-made zipper pull replacements are available for $2–5 from haberdashery shops or online in many styles and colours.

Problem 4: Zipper Slider Has Come Off Entirely

  1. 5

    Buy a replacement slider and re-thread it

    Purchase a replacement slider that matches the zipper size (look for a number on the slider — usually #3, #5 or #8 for clothing). Open the bottom stop of the zipper (a tiny metal or plastic piece) with pliers. Slide the new slider onto the zipper teeth from the bottom. Close the stop again. This takes about 10 minutes and costs under $5.

Zipper sizesZippers are sized by number — the higher the number, the larger/heavier the teeth. Size 3 is common for clothing and bags. Size 5 is common for jackets and outdoor gear. Size 8–10 is for heavy-duty bags and luggage. The number is moulded into the zipper slider. Match the replacement slider to the existing teeth size for correct fit.

Frequently Asked Questions

Replace rather than repair if: multiple teeth are missing or damaged (a missing tooth cannot be repaired — the zipper must be replaced), the fabric tape holding the teeth is torn or fraying significantly, or the zipper has been repaired multiple times and keeps failing. Full zipper replacement is a moderately complex sewing task — a tailor or alterations shop can replace a zipper for $15–40 depending on the garment and zipper type.
Run a graphite pencil or beeswax along the teeth occasionally — preventive lubrication keeps zippers moving smoothly. Do not force a zipper that feels resistance — forcing it jams teeth and damages the slider. Store bags and jackets with zippers slightly open to reduce stress on the teeth at the ends. Quality zippers (YKK brand) are significantly more durable than cheap alternatives.