Patched PatchesIn this guide
An iron-on patch has a layer of heat-activated glue on the back. Heat melts the glue, pressure pushes it into the fabric, and as it cools it sets. Almost every patch that falls off was either not hot enough, not pressed long enough, or put on a fabric that can't take the heat. Get those three right and the patch should survive years of wear.
You need about ten minutes, a household iron, an ironing board (or a firm, heat-safe surface), and a thin cotton cloth such as a tea towel or pillowcase.
Before you start: check the fabric
Iron-on patches work best on cotton, denim and polycotton, which all handle a hot iron. Look at the care label inside the garment:
- Three dots on the iron symbol (hot): fine for iron-on patches.
- Two dots (medium): usually fine with a pressing cloth and a little longer pressing.
- One dot or a crossed-out iron: don't iron the patch on. Sew it on or use fabric glue instead. This includes most nylon, polyester sportswear, waterproofs, leather and anything stretchy.
If you're not sure, test the iron on an inside seam first.
How to iron on a patch, step by step
- Wash and dry the garment first if it's new. Factory finishes (sizing) can stop the glue gripping.
- Heat the iron to its cotton setting (or the hottest the fabric label allows) and turn the steam off. Empty the water tank if your iron drips. Moisture stops the glue bonding.
- Iron the spot where the patch will go for a few seconds. A warm, smooth, dry surface bonds better.
- Place the patch glue side down. The glue side usually looks shiny or slightly plasticky. Check it's straight; it's hard to move once heated.
- Cover it with your pressing cloth. This protects the embroidery from scorching and spreads the heat evenly.
- Press firmly and hold still for about 30 to 45 seconds. Lean your weight on the iron. Don't slide it around, which can shift the patch. For a large patch, press it in sections, overlapping each one.
- Turn the garment inside out and press from the back for another 30 seconds or so. This heats the glue from the other side, which is the step most people skip.
- Check the edges. Once it's cooled slightly, gently push a fingernail against an edge. If it lifts, cover it and press again for 10 to 15 seconds.
- Let it cool completely before moving or wearing it. The glue sets as it cools.
Always follow any instructions that came with the patch if they differ from these. Some thicker patches need longer.
Why iron-on patches peel off
| Problem | Likely cause | Fix |
|---|---|---|
| Patch never stuck | Iron too cool, or steam on | Use the cotton setting with steam off, and press from the back |
| Edges lift after a day | Not enough pressure on the edges | Press the edges again under a cloth, leaning firmly |
| Came off in the wash | Washed too soon, too hot, or tumble dried | Wait 24 hours, wash cool and inside out, air dry |
| Glue soaked through as a shiny ring | Iron too hot for the fabric | Lower the heat; on delicate fabric, sew instead |
| Fabric melted or went shiny | Synthetic fabric | Sew or glue patches on synthetics |
Making it permanent
Iron-on glue is designed to hold, but it's not as strong as stitching. If the patch is going on something that gets heavy use or frequent washing, such as a work jacket, a school bag or children's clothes, iron it on first to hold it in place, then add a few stitches around the edge. See our guide on how to sew on a patch by hand. It takes ten minutes and makes the patch close to permanent.
If you'd rather not iron at all, or the fabric can't take the heat, a textile glue such as Gütermann HT2 is a good alternative. Read the instructions, as most need a day or so to cure fully before washing.
Don't
- Don't use steam. It cools the glue and wets the fabric.
- Don't iron directly on the patch without a cloth. Embroidery thread can scorch and PVC or rubber patches will melt. PVC patches should be sewn on.
- Don't iron onto nylon, waterproofs or sportswear. They can melt or go shiny.
- Don't wash it straight away. Give the glue at least a day.
Common questions
How long do you iron on a patch for?
About 30 to 45 seconds of firm, still pressure from the front, then about 30 seconds from the back. Larger or thicker patches may need a little longer. Always check the instructions that came with the patch.
Can you iron on a patch with steam?
No. Turn the steam off and empty the tank if it drips. Moisture stops the glue melting and bonding properly.
Can I use a hair straightener to iron on a patch?
For a small patch in an awkward spot, such as a cap or a sleeve, a hair straightener can work because it presses from both sides. Use a cloth to protect the patch and press for a similar time. A mini craft iron does the same job more easily.
Will an iron-on patch stay on in the wash?
Usually, if it was applied properly. Wash inside out on a cool, gentle cycle and air dry. For anything washed often, add a few stitches around the edge. Our guide to washing clothes with patches has more.
Can you iron a patch onto a polyester jacket?
Many polyesters can't take a hot iron. Check the care label: if it shows one dot or a crossed-out iron, sew or glue the patch on instead.
The short version
Use a dry iron on the cotton setting, a pressing cloth, and firm, still pressure for 30 to 45 seconds, then press again from the inside. Let it cool, wait a day before washing, and add a few stitches if it needs to be permanent. On synthetics, sew or glue instead.
Based on manufacturer instructions and established sewing practice. How we write our guides.