I believe superglue crumbles as it ages, so it would make a good temporary anchor while roots are formed. I've used it in my own wounds before with good results. Doctors use it and Koi surgeons use it, too. I'd suspect it should be allowed to cure above water first, for maximum safety and bond, then submerged. I'll bet if you compared chemicals between that 'Aqua-band-aid' product and a tube of super glue, you'd find some similarities.