Ft this way to replace a bad roof deck section and that was two years ago and it had been holding up fine.
Rv roof membrane lifting.
How to repair an rv metal roof.
Household roof coatings will seal a metal roof just fine but the best product by far for metal roofs is kool seal.
It seems to me that the membrane is still intact and in good shape it s just the glue that s failed.
Clean the roof thoroughly then use a rubber roof sealer to repair any cracks.
Then get roof epdm mastic and coat both the roof and the under side of the membrane and do not be skimpy.
Relay roof and reinstall trim with new putty tape and seal seams at trim with dicor.
Having said that fiberglass rv roofs require less maintenance than rubber rv roofs which makes them preferable for some campers.
This won t make it last any longer though.
Vent the rv so the air can not build up pressure when moving.
Before epdm and tpo metal was the material of choice for rv roofs.
This means you can avoid the maintenance and avoid fixing it up after every bad storm.
See if you find where the air is.
Fiberglass this type of rv roof is hard to the touch and is a bit more rare than a rubber rv roof because the material adds cost and weight to the rv.