Clean the roof thoroughly then use a rubber roof sealer to repair any cracks.
Rv roof membrane lifting.
Vent the rv so the air can not build up pressure when moving.
This won t make it last any longer though.
Before epdm and tpo metal was the material of choice for rv roofs.
Relay roof and reinstall trim with new putty tape and seal seams at trim with dicor.
Then get roof epdm mastic and coat both the roof and the under side of the membrane and do not be skimpy.
Household roof coatings will seal a metal roof just fine but the best product by far for metal roofs is kool seal.
Ft this way to replace a bad roof deck section and that was two years ago and it had been holding up fine.
See if you find where the air is.
How to repair an rv metal roof.
Pvc rubber roofing is the strongest rv membrane for roofing with the highest tensile strength and the most resistance to tears and punctures.
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.
The roof is wrinkled enough though that i don t think using the rubber roof is a viable option.
Having said that fiberglass rv roofs require less maintenance than rubber rv roofs which makes them preferable for some campers.