Older Apex's are hypalon (don't know about newer ones.)
Jason gave you a good course to follow.
That said, Aquaseal actually will repair hypalon, to a degree (won't last as long as a proper repair with the correct adhesive) but it 's kind of weird stuff: by itself, it takes at least 24 hours to set up, and during that time will run and drip and generally make a mess. Mixed with solvent (McNett's is called Cotol-240; mostly MEK, I think), it sets up in 15 to 60 minutes. Trick is to get a thin coat to bond really well to the hypalon material, then glue the two exposed coats of aquaseal. Done properly, it's as labor intensive as using a 2-part hypalon glue, with a shorter duration lifespan.