dlandino

I had a set made for me by a guy in California years ago. He dipped them about nine times to create a good plastic cocoon, but they didn't last a year in saltwater.

So, I don't know what a frag mag is, and I know this is a bit of a clumsy solution, but why not find a smallish rectangular magnet and cover and seal it with 6 sides of precisely cut acrylic? Then it would be well sealed, and depending on your acrylic skills, well fitted.

If you can get Weld-on #40, you can pour it into a small container and place the magnet in the liquid. Coming up with the perfect method will be tricky, because you don't want the magnet to sink to the bottom, plus you have to be able to press the hardened product out of the holder (like an ice cube in a tray), and polish it up which will be challenging with a small object WITH a magnet inside.

Good idea, Marc! You could place two (or how many ever) small acrylic rods (dowel pin size) to space the magnet off the bottom, fill it with the weld on in an ice cube tray, and use one of those soft silicone ice cube trays that can fold easily.