How Should I Glue Magnets?
Short answer
For most projects, use a two-part epoxy. Clean both surfaces with isopropyl alcohol, lightly scuff the smooth nickel plating, apply the glue, hold the magnet in place while it sets and let it cure for at least 24 hours before loading it. Never use hot glue: the heat can weaken the magnet.
How to Glue a Magnet, Step by Step
- Read the glue’s instructions for working time, cure time and compatible materials.
- Clean both surfaces with isopropyl alcohol to remove oil and dust.
- Scuff the surfaces lightly with coarse sandpaper or a few scratches from a utility knife. Don’t sand through the plating; just break the shine. Wipe away the dust.
- Check the pole direction before you glue if the magnet has to attract another magnet.
- Apply glue and position the magnet. Fill the pocket or cover the contact face fully.
- Hold it while it cures. Tape it, clamp it, or put a piece of steel on the far side to keep it from drifting. Keep other magnets and steel tools away.
- Wait at least 24 hours before putting stress on the bond.
Which Glue for Which Surface?
| Gluing the magnet to | Best choice | Also works |
|---|---|---|
| Wood | Two-part epoxy | E6000, polyurethane glue |
| Metal | Two-part epoxy | Cyanoacrylate (super glue) for small magnets |
| Plastic (ABS, PVC, acrylic, nylon, polycarbonate) | Plastic-bonding epoxy, such as Loctite Plastic Bonder | Test first: some plastics resist all glues |
| Glass or ceramic | Clear two-part epoxy | Silicone adhesive |
| Fabric or leather | Sew in Sewing Magnets | E6000 |
| Small craft magnets | Starbond Super Glue | Two-part epoxy |
Avoid These
- Hot glue guns: the heat can partly demagnetize neodymium magnets.
- Glue only around the edge: a full-face bond is much stronger.
- Loading the bond early: a strong magnet snapping to steel can rip out uncured glue.
No Glue Needed?
For flat surfaces, Magnets with 3M Adhesive are faster. For wood and plastic, Countersunk Magnets screw on and come off cleanly.