Dicor 501 self leveling lap sealant on roof seams, geocel clear on sides. Then of course there is the eternabond or www.rvroof.com
option for a permanent solution on the roof. Used the geocel for years on windows, doors and other sidewall stuff and it is superior to others in my opinion.
John and Rebecca Dickson
Emma-7 / Little John-5 / Iva-1
Full Timing Again, Rev B
2013 Ford F-350 Lariat CC LB PSD
2015 SOB TT - With OC's Awning Poles (#8)
At least in Heaven, RVs will be perfect, and I won't have to keep fixing them.