magnet reseal question

Sparkss · Mar 18, 2023

I have a feeder that the magnet seal appears to have failed on. I took it out to clean it and the magnet casing had small black-ish dots on it that turned out to be magnetic (they stuck to/were attracted to the side of the magnet casing). I am guessing they came from the feeder magnet itself. The casing seam does appear to be less than tightly sealed.

My question is what is the best, reef-safe method for resealing the casing? A general two-part epoxy, some kind of reef cement, AquaVitro 'bond' (that I am not sure would be 100% watertight), or something like the "UV liquid plastic repair" kits that are popular on Amazon and other sites? The easiest would be the UV resin repair kit, but I just recalled, that at least for resin printing, that there were no reef safe resins available, but the UV repair resin claims to be 100% waterproof and non-toxic once cured.

TIA for your feedback.

Pistondog · Mar 18, 2023

Why not super glue gel?

Sparkss · Mar 18, 2023

Pistondog said:
Why not super glue gel?

I wanted something more permanent. I read (and have seen anecdotally) that super glue degrades in salt water over time.

Pistondog · Mar 18, 2023

Sparkss said:
I wanted something more permanent. I read (and have seen anecdotally) that super glue degrades in salt water over time.

I think thats is true.
How about hot melt glue?
Sand/rough up surfaces 1st
Post in thread 'Hot Glue Reef Safe?' https://www.reef2reef.com/threads/hot-glue-reef-safe.271633/post-3262654

Auto-pilot · Mar 18, 2023

Honestly if your just looking to re-seal and you don't need a structural bond I would use silicone glue or RTV. It won't crack and leak because it's flexible, where any epoxy could eventually crack and leak

Sparkss · Mar 18, 2023

Pistondog said:
I think thats is true.
How about hot melt glue?
Sand/rough up surfaces 1st
Post in thread 'Hot Glue Reef Safe?' https://www.reef2reef.com/threads/hot-glue-reef-safe.271633/post-3262654

Thanks, that may be what I end up using, but as the seam is just splitting and the case has not fallen apart, roughing up the adjoining edges will be tough

Sparkss · Mar 18, 2023

Auto-pilot said:
Honestly if your just looking to re-seal and you don't need a structural bond I would use silicone glue or RTV. It won't crack and leak because it's flexible, where any epoxy could eventually crack and leak

RTV might work and I do have some, silicone however is usually pretty picky about sticking to plastics though, especially long term. I will check the tube of RTV that I have to make sure it will work for this.