Your guide to using glue on metal

August 25, 2020 5:06 pm

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Anyone with any experience in making or repairing items will tell you that it is vital to select the best adhesive for the job. This can be a more difficult job than it first appears thanks to the myriad of glues and adhesives available, not to mention the types of materials you may wish to glue together.

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Selecting the wrong glue for the job could result in reduced lifespan for the item being made or the glue failing to adhere entirely. Let’s take a look at the best glues to use on metal.

There is more than one choice

When considering the best metal bonding adhesives, it is important to think about what you are gluing to the metal, as well as how fast the glue needs to cure and where the finished project will end up.

Gluing Metal to Metal

If you are looking for the best metal bonding adhesives to adhere metal to metal, epoxy-based adhesives are likely to be the most versatile, especially if a weather-resistant solution is needed. Make sure both surfaces are cleaned thoroughly and then sanded down to create a rough ‘keying’ so that a strong bond can be formed. Ensure that the parts are clamped together firmly until the glue is cured.

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Gluing Metal to Wood

Look for a polyurethane-based adhesive when faced with the challenge of adhering metal to wood. Due to the differences between the surfaces, it can be tricky to glue wood to metal, so much so that the glue may end up stronger than the wood it is gluing.

Gluing Metal to Glass

Epoxies are adept at gluing metal to glass due to the fact that you are afforded a bit of time to make sure the placement of the parts is just right before the glue starts to cure. It is vital to ensure the glass is clean, with no finger marks or oils present, as these can interfere with the bond, leaving it more likely to fail.

Gluing Metal to Plastic

Several issues can arise when gluing metal to plastic, especially because the chemical compositions of many plastics are vastly different. An adhesive that works on one plastic may not work on another. The most versatile glue for this application is an epoxy, but make sure it is compatible with the plastic being used.