Fixing a Broken Key with Super Glue – A Step by Step Guide

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Have you ever been in a rush to get out the door, only to find that your key has broken off in the lock? It’s a frustrating situation that can leave you feeling helpless. But fear not! With a little bit of super glue and some patience, you can easily fix your broken key and get back to your daily routine. In this article, we’ll go over the step-by-step process of how to fix a broken key with super glue.

Materials Needed

Materials Needed
Before you begin fixing your broken key, it’s essential to ensure you have all the materials needed. Fortunately, you don’t have to look far to gather the necessary supplies for this simple at-home DIY fix. Here’s an overview of what you’ll need to get started:

Super Glue: This article assumes you already have your super glue on hand, but if not, you can learn how to use it effectively with our guide on how to use CA glue. Alternatively, you can go straight to your nearest hardware store and find super glue, recommending Loctite Super Glue, which dries quickly and is incredibly durable.
Broken Key: This may seem obvious, but make sure you have all the broken pieces of the key before you start. Otherwise, you’ll be unable to fix it effectively.
Warm Water: You’ll need some warm water and dish soap to clean the key pieces before gluing them together.
Toothpick: This is a helpful tool to apply tiny amounts of glue in tight spaces. However, if you use too much glue, the toothpick will not be useful.
Paper Towel or Rag: This is essential – you need to make sure you’re working on a clean surface and protect your hands while handling glue. If you use your hand, it could stick to the key. It’s also crucial to clean up excess glue before it dries, or it may be challenging to remove.

Now that you have all the necessary materials let’s dive into the step-by-step process of how to fix a broken key with super glue. Before starting, you need to know how long it takes superglue to dry. If you don’t already know, check out our article on Loctite super glue how long to dry and how to use it effectively.

What You’ll need

To fix a broken key with super glue, you will need a few materials. You might already have some of them at home, but it’s good to double-check before starting the repair process. Here is what you’ll need:

Materials Description
Super glue The most important material you’ll need is, of course, the super glue. Make sure to get a high-quality brand for the best results. You can learn more about how to use super glue correctly here.
Sandpaper You will need sandpaper to sand the broken edges of the key properly. Make sure to use fine-grit sandpaper, around 220-grit should do the trick.
Toothpick To apply the glue precisely, you’ll need a toothpick. This will help you to avoid adding too much glue.
Tape Using tape can help you hold the broken pieces of the key together while the glue dries. Make sure to use strong tape that won’t fall off.
Cotton Swab You can use a cotton swab to clean any excess glue from the key or your fingers.
Optional: Epoxy putty If your key is severely broken, you can use epoxy putty to mold the missing pieces. However, this is an optional material and might not be necessary for all repairs.
Optional: Paint If your key has a visible crack after repairing it, you can use paint to make it look better. However, it’s also an optional material, and you can skip it if the crack is not too visible.

Make sure to gather all the materials before starting the repair process. You might also want to check how long does super glue take to dry, which you can do here.

Step by Step Guide

Step By Step Guide
Are you tired of fumbling with a broken key? Don’t worry, you don’t need to replace it just yet. With a few materials and some patience, you can fix it yourself. Here’s a step-by-step guide on how to fix a broken key with super glue. Grab your materials and let’s get started!

Step 1: Clean the Key

Before beginning the key repair process, it is important to ensure that the key is clean and free from any dust, debris, or oils. Follow the below steps to properly clean the key:

  • Remove any visible debris: Use a toothpick or another small tool to remove any visible debris from the broken key pieces. Be gentle to avoid damaging the key further.
  • Wipe the key with alcohol: Use a cloth or cotton swab and dip it in isopropyl alcohol, then gently wipe the key to remove any oils, dirt or fingerprints. Allow it to dry completely before proceeding to the next step.
  • Sand the broken edges of the key: Use a small piece of sandpaper to lightly sand the broken edges of the key. This will help the glue adhere better and result in a stronger bond. Be careful not to sand too much or damage the integrity of the key even further.

By following these steps to properly clean the key, you can ensure the super glue adheres to the surface and creates a bond that is strong enough to fix the broken key.

Step 2: Apply the Super Glue

To fix a broken key with super glue, the second step is to apply the glue to the broken edges of the key. Before applying the glue, make sure that the broken ends of the key are clean and free of any debris, dust, or oil. This will ensure that the glue bonds strongly and permanently.

To apply the glue, hold one piece of the key steady with your fingers. Then, put a small amount of super glue directly onto the other broken piece. Be careful not to apply too much glue, as this can cause the pieces to slide around and make a mess.

Using a toothpick or the tip of the glue nozzle, spread the glue evenly over the broken edge of the key. Make sure that the glue is applied to both sides of the broken pieces, as this will help create a strong bond between the two pieces.

Once the glue is applied, carefully line up the broken ends of the key and press them firmly together. Use your fingers to hold the pieces in place for a few moments until the glue begins to dry.

Be careful not to get any glue on your fingers, as this can create a mess and make it difficult to hold the key in place. If you accidentally get glue on your fingers, use a cloth or tissue to wipe it off immediately.

Remember: When applying super glue to a broken key, use caution and take your time. A steady hand and a precise application of glue can mean the difference between a successful repair and a messy, ineffective fix.

Step 3: Hold the Pieces Together

Now that the super glue has been applied to the broken key, it’s important to hold the pieces together firmly to ensure a proper bond. Here are some detailed steps to help you with this process:

  • Press the Pieces Together: Hold both pieces of the broken key together and press them firmly for at least 30 seconds. This will help the super glue to spread evenly across the broken surfaces and create a strong bond.
  • Use Clamps: If the broken key is too big to hold with your fingers, use clamps to keep the pieces together. Make sure to place a piece of cloth over the clamps to prevent them from leaving any marks on the key.
  • Wait for the Glue to Dry: After pressing the pieces together, let the super glue dry for at least an hour. Don’t be tempted to use the key before the glue is completely dry, as this can weaken the bond and cause the key to break again.
  • Avoid Moving the Key: While waiting for the glue to dry, avoid moving the key or applying any pressure to it. This can cause the pieces to shift and weaken the bond.

Remember, be patient while holding the pieces together and let the super glue fully dry before attempting to use the key again. With this step complete, you’re well on your way to fixing your broken key with super glue.

Step 4: Let the Super Glue Dry

After holding the pieces of the broken key together for a few minutes using the super glue, you should now let it dry completely. This step is crucial to ensure that the key doesn’t break again easily.

Here are some things to keep in mind while letting the super glue dry:

Tip Explanation
1. Don’t touch the key While the superglue dries, it is crucial that you do not touch the key or apply any pressure on it. Doing so may cause the glue to come off and render your repair efforts futile.
2. Let the glue dry naturally Do not use a hairdryer or a heat source to speed up the drying process. Letting the glue dry gradually ensures that it forms a strong bond between the two pieces of the key.
3. Give it enough time It’s best to let the super glue dry for at least 10-15 minutes. However, for a more secure bond, it’s advisable to let it dry overnight.

Remember, patience is key when it comes to drying the super glue. Rushing this step may compromise the strength of the bond. Once the glue has completely dried, carefully test the key to make sure it’s now repaired and back to functioning like a new one.

Additional Tips

As you work on fixing the broken key with super glue, there are a few additional tips that can help you achieve the best results possible. These tips will help you make the process easier, more precise, and less frustrating. Consider incorporating these tips into your process to ensure that the outcome is a strong and reliable key that works as good as new. Here are two helpful tips to keep in mind.

Tip 1: Use a Toothpick for Precision

When fixing a broken key with super glue, precision is key to ensure a successful repair. One helpful tip is to use a toothpick to apply the glue with accuracy. This allows for easier application of the glue on the precise location of the break.

Here are a few ways that using a toothpick can improve precision:

Advantages of using a toothpick: Disadvantages of not using a toothpick:
  • Allows for targeted application of glue
  • Allows for precise control of the amount of glue applied
  • Helps prevent excess glue from spreading and creating a mess
  • Difficult to apply glue without spilling or creating a mess
  • May result in uneven distribution of glue on the broken pieces
  • May cause glue to dry unevenly and result in a weak bond

Using a toothpick to apply the glue also helps prevent the glue from coming into contact with your skin, which can be irritating and difficult to remove. Additionally, using a toothpick allows for more control over the glue application, reducing the risk of over-applying or under-applying the glue.

Here are some additional tips when using a toothpick:

  • Use a fresh toothpick for each application to prevent cross-contamination of the glue
  • Dip the tip of the toothpick in the glue and apply it to the broken key
  • Use a light touch to avoid applying too much pressure and causing the glue to spread
  • Allow the glue to dry completely before reinserting the repaired key into the lock

Using a toothpick for precision may seem like a small detail, but it can make a big difference in the success of your key repair. By using this tip, you can ensure a stronger bond and a more successful repair overall.

Tip 2: Avoid Using Too Much Glue

Applying too much glue is a common mistake that people make while repairing a broken key with super glue. It might seem like using more glue is a better option to ensure that the key stays in place, but that’s not true. Using too much glue can actually make the repair weaker and cause more damage to the key. Here are some tips to help you avoid using too much glue:

  • Start with a small amount of glue: Instead of applying a lot of glue at once, start with a small amount. You can always add more glue if needed, but it’s difficult to remove excess glue without making a mess.
  • Spread the glue evenly: Once you’ve applied a small amount of glue, spread it evenly over the broken pieces of the key. This will ensure that the glue is evenly distributed and there are no gaps or air bubbles that could weaken the bond.
  • Use a toothpick or a cotton swab: Instead of applying glue directly from the bottle, use a toothpick or a cotton swab to spread the glue. This will give you more control over the amount of glue you apply and prevent you from accidentally using too much.
  • Wipe off any excess glue: If you do accidentally apply too much glue, use a clean cloth or tissue to wipe off the excess. This will prevent the glue from running and making a mess.
  • Allow the glue to dry completely: Lastly, allow the glue to dry completely before using the key. Using the key before the glue is fully dry can cause the bond to weaken or break altogether. Generally, super glue takes around 24 hours to dry completely, but check the instructions on the glue bottle for specific drying times.

Remember that using too much glue can actually do more harm than good. By following these tips and using just the right amount of glue, you can ensure a strong and lasting repair for your broken key.


After following these steps, you should have successfully repaired your broken key with super glue. Remember to clean the key, apply the glue, hold the pieces together, and let the glue dry. Additionally, use a toothpick for precision and avoid using too much glue.

It’s important to remember that fixing a broken key with super glue is a temporary solution and may not last forever. You should still consider getting a replacement key from a locksmith or the manufacturer if the key is particularly essential or frequently used.

However, this DIY fix can save you time and money in the short-term and provide a quick solution in an emergency situation. Just be careful not to get super glue on your fingers or other objects, and work in a well-ventilated area to avoid inhaling the fumes.

With these tips and instructions, you can confidently tackle a broken key with super glue and get back to using your key in no time. Happy fixing!

Frequently Asked Questions

What do I do if my broken key won’t stick back together?

If the key doesn’t stick back together after using super glue, you may want to consider purchasing a replacement key or seeking professional repairs.

Can repairing a broken key with super glue make it weaker?

While super glue can provide a strong bond, it may not be as strong as the original. However, it should still be strong enough for regular use.

How long should I hold the key together while the super glue sets?

Hold the key together for at least 30 seconds to allow the glue to set before letting go.

Are there any risks to repairing a key with super glue?

There is a slight risk of getting super glue on your skin or accidentally gluing your fingers together. Be careful and use gloves or wash your hands immediately if this happens.

Can super glue be used for all types of keys?

While super glue can be used for most types of keys, it may not work as well on certain materials such as plastic or rubber.

What if I accidentally put too much super glue on the key?

If you accidentally put too much glue on the key, gently wipe away the excess with a cloth or tissue. Do not spread the glue around as it may cause the key to become misshapen.

Can I use regular super glue or should I use a specific type?

You can use regular super glue, but it’s best to use a high-quality, clear super glue specifically designed for bonding small objects like keys.

What is the best way to clean the key before applying super glue?

Clean the key with rubbing alcohol or another similar cleaning agent to ensure there is no debris or dirt on the key before applying the glue. Let the key dry completely before applying the glue.

How long does it take for the super glue to dry?

Super glue usually dries within 10-20 seconds, but it’s best to wait at least 5 minutes to ensure a strong bond before using the repaired key.

Can I use this method to repair other small objects?

Yes, this method can be used to repair other small objects such as jewelry, toys, or even phone cases. However, the strength of the bond may vary depending on the material being repaired.


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