Can I use a soldering iron to weld plastic?

Usually, when a plastic object breaks or cracks, our first thought is to throw it away and buy a new one. However, there is no need to spend money on something that you can get back.

Although you may not know it, it is possible to use a soldering iron to weld plastic. You might be surprised to learn that plastic is quite malleable, so it’s easy to put back together with a soldering iron. Here will explain to you how the process works.

How do you weld plastic with a soldering iron?

Before explaining how to weld plastic with a soldering iron, you should be aware that the piece will not be the same, especially if it is the first time you have used this technique. What is essential here is to avoid buying a new product and to avoid disposing of the plastic that is so harmful to the environment.

Once you have practiced and know how to solder plastic with a soldering iron, you will get incredible results.

The task of using a soldering iron to weld plastic is not limited to repairs. What do we mean? You can weld plastic for artistic purposes if you are passionate about it. It’s a way to distract yourself and give life to that piece of plastic you thought was beyond repair.

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Below, we explain how to weld a plastic object if you already have the tools. But first, we advise you to experiment with disposable parts to learn how to use the soldering iron.

  1. Clean the plastic with soap. If it is filthy, use a degreaser. Proceed to sand the edges. This will make them delicate and prevent you from hurting your fingers.
  2. Connect the soldering iron and wait for it to heat up. Leave it for a few minutes. Then, join the two pieces of plastic. You can also move them around during this time to get the best possible fit. In this step, it is advisable to ask for another person’s help so you can focus on passing the soldering iron and getting them to melt.
  3. Once you have successfully joined the parts, reinforce the solder by adding small pieces of plastic. Then, proceed to solder these parts by pressing them with the soldering iron until they melt.
  4. Finally, pass the soldering iron tip over the seam with smooth movements to achieve a perfect finish. Once you have perfected the technique, you can make welds on plastics.
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Attention: the smoke that emanates from the plastic when the soldering iron melts are harmful. Therefore, if you are in an enclosed space, it is recommended that you wear a protective mask or perform the task outdoors.

Is there another method for welding plastic with a soldering iron?

If you have no experience or skills in using a soldering iron or cannot manage to join the two parts of the plastic, there is an optional method that could help you, and you will be able to recycle the object and save money.

  1. Hold the two parts of the plastic and place glue at the joint (it has to work on this type of surface). The more glue you use, the better the result, but don’t overdo it.
  2. Place a layer of baking soda on top of the glue and cover it to prevent it from showing.
  3. Next, top it off with more glue; you can apply plenty at this point.
  4. Finally, let it dry. When it is ready, use the soldering iron for a stronger bond. That way, you will have soldered plastic with a soldering iron.
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Remember, do not throw away plastic objects. Always look for ways to recycle what you don’t use anymore.