Trust me the eternabond will stick to that surface.
How to clean fiberglass rv roof prior to eternabond.
Apply a bug and tar remover formulated for fiberglass to any of the areas affected by bugs tree sap or white or black.
This is best done by scrubbing with a scotch bright type of abrasive pad then rubbing vigorously with a clean rag.
The roof should be scrubbed then wiped.
To do so sweep off the surface to remove dirt and debris buildup and then rinse it off with a hose.
You can use mek methyl ethyl ketone or acetone to remove any grease stains.
Just make sure you clean it real well prior to putting it on.
I was less than thrilled.
Be careful not to sweep any dirt or leaves into the drain under any roof mounted air conditioning.
When you do put it on make sure you follow the instructions and rub it down real good the rubbing action heats up the eternabond which in turn activates the glue on the tape.
It seemed like this was a roof that could easily leak so i decided to beef up the very long roof seams.
The same process should be repeated for all components secured to the roof.
And keep in mind the type of roof aluminum fiberglass epdm etc will dictate other specific guidelines.
Just like knowing what to use to clean your rv s interior pay attention to what you should use on your roof.
Remove the mica dust on epdm scrub the surface of tpo and pvc to remove coatings or dust and remove any oils or dust from metals or fiberglass.
How to clean a fiberglass rv.
If you do decided to go that route i found that using acetone to clean the surfaces first will result in good adherence.
In those instances i would also remove the roof vent itself and put fresh butyl tape under the flange and re secure it to the roof.
This was a mistake.
Working in sections apply your chosen cleaning substance and scrub with a soft bristled brush.
While the seabreeze roof was a solid piece of fiberglass the newmar roof was a large rectangle that was screwed and glued to the top of the rv.
Our 2013 ds came with eternabond on the fiberglass roof to cap joints.
In order to get the best results the surface must be free from any oil or grease.
Sweep the rv roof with a broom.