Sealant to use for roof touch ups

[rorielly]

So, I’m coming up on the 3 month mark for ownership of my new travel trailer. I was told to check the caulking after 3 months to make sure nothing is cracked or coming off etc, and to then check it at end of season and beginning of season thereafter. So I figured o should make sure I get the right stuff when the time comes.

I checked my roof and it’s TPO. Textured on one side (facing outside) and smooth on the other. No fleece backing. The only product I can see online is a 2 step product where you have to paint primer first (dicor ultra sealant). To do possible touch ups, this seems to be a bit of a nuisance. Is that the only product that is guaranteed? I read about alpha systems sealants but I can’t seem to figure out which one. My dealer isn’t exactly nearby, otherwise I would just stop there and find out.