When I sealed my system I used plain old "goop" the "outdoor" stuff..
I got it form lowes I think... or home depot.
comes in a green tube, I think the pakacge showed an example of sealing a hose and stuff.. this stuff bonds good, and seals good. just make sure and test it after each application has dried. sometimes you might miss something.
Ive actually used both. They both work great. The only problem I ran into was if for some reason I needed to take the barbs off, the super glue was a bis natch to get off. The sealer/epoxy was alot easier.