JMO ...mods/adm should delete Badger Mcadams and part of ajriding off topic political rant that has nothing to do with answering the OP questions about sealing products. Seems like some can't take off their political glasses.
My thoughts;...my 1997 32' 5er is going on 24 years old and has had nothing but self leveling Dicor on the roof replacing OEM sealants when needed. Much of the OEM sealant is still doing its job.
Units this old need extra watching up there as OEM plastic covers/roof jacks other sealants get brittle and easily break or crack allowing water intrusion.
I wouldn't use a tape on my trailers roof especially over scr heads other than patching a hole or a torn area.
Eternabond has been around several years and has a good service record.