Is crazy glue reef safe?

[Lampshade]

I've used gorilla glue before in my tank, it's a polyurethane so technically it should be inert once cured. Only issue is that it's only a mechanical bond, so doesn't do to well on smooth surfaces. I just used a locktite on a motor impeller while i wait for the replacment part from tunze. The magnet slipped off the ceramic holding the blades. So far it's worked great, and my fish are still alive!. might not need that replacment part after all...