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Adhesives and Magnets

Magnets are an essential for many projects—whether it be home improvement or part of a product you are selling.

In such cases, where magnets are a part of a larger endgame, it is necessary to glue them. Sounds easy, right? Less so than it might seem. Below are some tips and tricks that may ensure your success the first time around.

Tips of Application:

  • Make sure to read the instructions of the adhesive you’re using. After all, they are the expert of their own product!
  • Clean the surfaces you’re going to apply the adhesive to. Residue, grease, or dirt can create an unnecessary barrier that doesn’t allow the glue to take hold as intended.
    • Not sure what to clean with? Isopropyl alcohol or similar will do the trick.
  • Many epoxies and adhesives suggest roughening the smooth surface you intend to glue, as that makes the adhesive bond better.
    • To roughen the magnet surface, you can either use 10-50 grit sandpaper or scratch it with a nail. Make sure to clean the dust off afterwards.
  • Gluing magnets to plastic is trickier due to the difficulty of getting a good adhesive bond to the plastic. Some plastics hold adhesives better than others. Contact the adhesive customer support for questions / advice about plastic and their glue.
    • Loctite Plastic Bonder Epoxy has been shown to have successful outcomes, working well with many plastics such as ABS, PVC, Acrylic, Nylon, Polycarbonate, and Mylar.
  • Keep the newly glued magnets separate from other magnetic surfaces that might pull it away from the drying bond. In addition, you can place steel on the other side of the glued surface to help hold the magnet in place while drying. We recommend a cure time of 24 hours.

Which Glue Should I Choose? The following list is the top recommended glues due to ease of application and cleanliness, although this list may not be fully comprehensive.

  • Recommended:
    • Two-Part Epoxy (majority of the time, epoxy works best).
    • Double/Bubble Orange Epoxy Adhesive
    • E6000 Adhesive
    • Acrylic Adhesive
    • Super glue / Cyanoacrylate
    • Gorilla Glue / Urethane adhesives
    • Liquid Nails
    • Silicone Adhesives
    • Mod podge
  • Dot Not Use:
    • Hot glue guns. High temperatures can demagnetize magnets, rendering your purchase unusable.

 


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