if you are repairing seam splits, id recommend neoprene cement or "Amazing Goop". For liquid taping, try using "Plasti-Dip". Get the kind in the tall jar, not the spray. Just dunk a brush in there and paint it on. Make sure you mix it up well first, and consider doing more than one coat. It comes in all colors including clear, but black will look best on most suits.
McNett Seal cement, comes in a 4 oz jar for around ten dollars, cant beat it, surf shops sell it.just gotta ask.
wetsuit neoprene cement- check out your local dive shop, they have all kinds of stuff.... I'm interested in trying that plasti-dip tho....