I just went thru 6 tubes of this stuff doing my rot repair on the TT. I can't say enough good stuff about this, except it will get everywhere you want it and more. Hand cleaning was a challenge, have lots of rags handy. They have a self leveling product as well.
I am a big advocate of Eternabond. However, I have seen it fail twice. Once was on a metal to metal seam. The other was on a metal to membrane roof seam. When I put it on, I put Dicor on the edges as a belt and suspenders approach.