We have a new fiver with a TPO roof. After reading your post I started searching around and have decided to go with Sikaflex 715 for my roof.
Here’s a link:
https://usa.sika.com/dms/getdocument...20Brochure.pdf
It looks like that Dicor Roof Handbook was written back in 2012. I’m wondering if they are even making their Ultra product anymore. If you can find it, I’d check the age of the product.
I’m still looking into cleaning. It seems that anything with petroleum distillates is a no no. Some people used alcohol to clean.
Dicor Lap Sealant is solvent based, but I read in multiple places where people used it. Roofs wrinkling up temporarily seemed to be a common occurrence.