Secure the Magnets With Heat Shrink Tubing
Magnets are a pretty convenient way to keep things organized and to the side, and we’ve talked about the different ways of attaching and using them earlier. If you need to securely attach the magnet to an object where other methods may not work, heat shrink tubing is the way to go.
As Instructables user WilliamH11 notes, it couldn’t be easier. Simply install the heat shrink tubing, insert the magnet, and heat the tubing to squeeze it and hold the magnet in place. Simple? Yes, but simplicity can be quite effective.
Secure the magnets with heat shrink tubing | Instructables