I had mine done by rvroof.com, at the HQ in Florida which happens to be near where I live.... approx September 2016
I did mine not because of roof membrane failure, but because of several defects form the factory in how the roof was put together. After fixing the rot I had to find a way to dry it in, and this was the only thing I could figure out.
It costs about the same as a standard re-roof...so kinda pricey if you are just trying to avoid caulking.
That being said, I am so far happy with it.
Seems to ad a bit of an R value to the roof
and it makes it quieter while on the road according to DW...so she's happy
and to me it is beautiful to not worry about it so much.
I'm due to do a little TLC sealing around the windows and such, but nothing that I'm sweating about.
One thing that isn't horribly clear on the web site when I was looking...it's not 100% maintenance free. The coating is topcoated with a flexible paint as a UV shield.... the same stuff they use on stucco houses....so at some point I'll be repainting my roof.
So far though...I was up there and pressure washed it a few weeks ago (would never do that before!) and it's still looking good.
If you seriously consider it, PM me.... they gave me a little coupon book
It's "$50 off final sprayed roof price"
and says it's valid at all RV Flexarmor locations
Full disclosure...It doesn't say on the coupon, but I remember him saying that they would send me some little kick back....if I'm remembering correctly, maybe $10 or something if my memory serves....so that's what's in it for me....not much. I'm just happy to help a fellow RV'er!