I suspect the question's being read too narrowly. What makes a good contact cement/rubber solution/EVA foam glue (which as far as I can see are pretty much the same thing) really depends on the quality of the liquid latex which went into the solvent in the first place. Several things struck me from a knowledge of working in latex with that stuff, which sum up as "do a bit more than RTFM on the label".
Firstly, is it strong enough in the long term? Secondly, what about prepping the glue site?
Normally, when gluing sheet latex, we need to make certain the surfaces are prepped. That means a clean in very lightly soaped water, to remove organic muck, and then again in latex thinners, which opens the fibres and causes the latex to curl. When that's dried, it's flattened out again, and ready for a coat of latex solution, a much thinner version of the glues quoted, all of which I think I've used. Thin is good here, it makes a stronger join. Once again, that's allowed to dry, and we join up, paying great attention to stretch, so registration points match. Some people use tape to pre-register them, but that can force angles.
That's just the glueing, of thin sheet. There's a halfway house, in neoprene wetsuits. They do pretty much the same, but then reinforce the butt joint with overstitching and taping, because where glued latex bonds over around a 5mm 1/4" width sufficiently stringly as to meet most needs, the air pockets in 3mm thick material butt-jointed reduce the contact areas significantly. If you heat-treat the surface, I'd think you might improve that, but the real answer is that they add more reinforcement, by over-sewing the seam, and in more expensive suits, tape that, which means further glue to get close to the 5mm.
