We'll add our vote for SC2000 for hypalon repairs
. Extremely strong, easy to use, and best of all, if you keep the hardener part in the fridge (and it is a tiny glass bottle), it lasts years on the shelf, even after opening. Downside is that unlike the Bostic two pot cement that most manufacturers use, applying heat does not break down the bond, so that disassembly is not practical once it has set up.
5200 will do a useful job, but it's long cure time makes it hard to use on your dinghy
... at least, ours is in daily use, and the multi-day cure would be a problem. Sikaflex 291 or Fixtec might be a bit better in this regard, and would have adequate strength for many applications.
Jim and Ann s/v Insatiable II lying Broken Bay, NSW, Oz