Well I e-mailed permatex and this is what they said.
In response to your questions about epoxy being used in
aquarium applications:
* Once the epoxy is cured ... it will not outgas or give off any harmful
materials.
* However ... it has been my experience that epoxy ... when continually
immersed in fresh and salt water aquariums does not always hold its
bond.
Need to know exactly what type materials you are bonding; e.g. plastic,
metal, glass, etc ... to make a correct judgement for your particular
application.
I think I will give it a try.
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