The first thing that people who do not know how to glue plastic should learn is how to choose the right type of Epoxy of the job. Certain types of glues will work great with some materials but not others. When trying to attach plastic to metal, there are two basic options:
Tube-based Epoxy: Ready to use and packaged in a toothpaste-like tube that makes application simple, this type of Epoxy is useful for attaching small objects together. Often, this type of glue is clear like silicone. Despite looking fairly innocuous, this substance can be very toxic and odoriferous. For that reason, you should always use it in a well-ventilated area. Take into account that it needs a long drying time to be perfectly solid (normally, four to eight hours).
Two-part Epoxy putty: This type of Epoxy is more resistant and durable than tube-based Epoxy. For that reason, it is often used to attach larger objects. It comes as two separate substances that need to be mixed together in order to be used. One of these components is the resin and the other is the hardener. The process of mixing them together for activation is known as kneading. Once kneaded, this type of Epoxy needs to be used immediately as its drying time is shorter than that of the tube-based Epoxy.
Prepare the Work Area
Before beginning the process of attaching the objects, it's important to prepare the area to ensure efficiency and avoid accidents. Spread large sheets of paper (such as old newspaper) on a table. Make sure that the paper sheets are covering the entire area as Epoxy can be very messy and damaging to furniture and other objects. Additionally, clean both the plastic and the metal objects using a damp cloth.
Prepare the Surfaces
If you want to know how to glue plastic to metal effectively, it's vital that you learn about preparing the surfaces of both the plastic and the metal objects. In order to work properly, Epoxy needs to be applied to smooth, flat and clean surfaces. You can achieve this by gently using the sandpaper on both surfaces. However, be careful not to damage the surfaces during this process.
Prepare the Epoxy
If you are using two-part Epoxy putty, prepare it by mixing it on a disposable surface such as a cardboard plate. Make sure to mix the substances in the right proportions as directed by the product’s manufacturer. Typically, however, you should mix together equal amounts of each product. Be sure not to prepare too much as you will most likely only need a small amount.
Apply the Epoxy
Using a brush, apply the Epoxy to the surfaces that will be making contact. Be thorough doing this, making sure that you cover the entirety of the contact areas of both the plastic and the metal objects. Do not apply too much, however, as this could do more harm than good.
Press the Objects Together
Press both the metal and the plastic objects together firmly and carefully. Once you have found the right position for both objects, use the clamp to maintain them in place. You could also use rubber bands to achieve this goal. Typically, Epoxy will take at least two hours to dry.
Remove the Clamps
After the Epoxy has had time to dry, it is time for you to remove the clamps. By this time, the objects should be glued together tightly and firmly. If there visible traces of glue on the objects, you can use a damp cloth to remove them. If the adhesive did not set and the objects are not well attached, however, you will need to repeat the process. This time, however, try applying more pressure and leaving the glue to dry for longer.
How to Glue PVC to Metal
Lastly, in this guide on how to glue plastic to metal, we will go over a controversial issue: can you glue PVC to metal?
Technically, this is not possible as PVC types of cement and glues do not adhere to metal. What you can do, however, is use a plastic object between the PVC and the metal. First, attach the metal to the plastic using the steps previously described in this guide on how to glue plastic to metal. Once the drying process has elapsed and both objects are firmly attached together, use a PVC cement to attach the intermediate plastic surface to the piece of PVC. Let the PVC cement dry overnight as it can take longer than Epoxy to become solidified.
Hopefully, this step-by-step guide on how to glue plastic to metal has been helpful to you. Remember, though, to be careful when handling the toxic materials that you will use to achieve your goal. Do you know any other methods for attaching plastic and PVC to metal? Let us know in the comment section!