Many members have used Eternabond, and most report great results. However, something you might consider. RV shops are not big fans of the stuff.
I have spoken to three local shops. With each conversation I have made it clear I was going to do the job myself, so I do not think they would have much motivation to lie to me.
They all recommend dicor. I do not know which is correct, but I personally tend to go with the opinion, of folks who do that work for a living, rather than that of an individual owner. So for me at least I will stick to dicor.