Reef safe magnets

WILLIEOWILL · Jan 10, 2020

cromag27 said:
Safe until you get a leak. I personally wouldn't trust plasti-dip.

What would you use to coat a neodymium magnet to make it safe for under water use

IanK · Jan 10, 2020

What about coating them with silicone??

James.gridley · Mar 22, 2020

IanK said:
What about coating them with silicone??

I wonder if aquarium safe silicone could be heated up so its liquefied, then dip the magnet, let cure, and repeat the process a few times...

Joekovar · Mar 22, 2020

IanK said:
What about coating them with silicone??

Any oxidants on the surface of the magnet will react and create tiny rust spots. The silicone will prevent any new oxidizing molecules from entering and stall the oxidation/rusting.

mfinn · Mar 22, 2020

WILLIEOWILL said:
What would you use to coat a neodymium magnet to make it safe for under water use

I used polyester casting resin and I used a dye in the resin.

Billdogg · Mar 22, 2020

I get them already plastic coated from www.kjmagnetics.com Some are over 5 years old with no sign of problems. Way easier than DIY and probably the same or similar price

MattR · Apr 26, 2020

I know this is an old thread but can someone post and updated link with the exact magnets that they have used with success? Just want to make sure I get the correct ones. specifically from kjmagnetics. Looking to make a diy shroom box so nothing crazy big or heavy. Black or white color

Zephrant · Apr 27, 2020

The black epoxy coated ones work well, if you can keep them from ever being scratched.
I encapsulate then in PETG, which protects the epoxy coating.

Billdogg · Apr 27, 2020

https://www.kjmagnetics.com/proddetail.asp?prod=DC6PC-BLK&cat=1
they have them in black, white, red, blue and maybe yellow. From their home page you can buy pretty much any size/shape/strength you need.

I have used dozen of them over the years without any troubles at all. I've probably got 20 of them stuck to an I beam in my workshop right now
hth!