[slow]

A few years ago I spoke with the Alpha service department and they said Dicor is ok to use on their tpo. But the word of caution was that I should limit the amount of Dicor on the tpo since it would lift the tpo off the adhesive as it set up. I suspect Keystone used Dicor on my roof and that is why I have the tpo lifting along the caulking.

Dicor is readily available so that is what I use for touch ups and when I installed a new power roof vent.

Also a week after I bought our TT, I too applied Dicor as you plan on the front roof seam. On our fifth season now. No issues doing so (yet).