Previous black tar roof repair leaking.

Heat gun and plastic scraper
Remove all of it
Clean with acetone or MEK
Then use wide eternabond tape on to seal it
There is nothing you put on top of that , that will stay sealed
It will continue to crack and rip, and tear open anything you cover it with

Strictly for emergency repair get several tubes of self leveling polyurethane sealant from the roofing department of your local home depot etc...and fill the crack
Start at one end run all the wait to the other side, then go back and lay another bead, repeat until full
Self leveling is runny, so you have to do it by layers all the way across each time until done , fill it full so there is no place for water to collect
Because of the tar, this will only be a temporary fix
Eventually you have to do the total removal to make a permanent repair
Tar is the worse possible thing you can put on an RV roof

Have you tried peeling the tar off? For a quick, temporary fix I would pull as much of the tar off as possible, then use one of the spray epdm coatings- either the "as seen on TV" stuff, or Spray-N-Seal.

That's a RV roof? I thought I was looking at the surface of the moon.

Black tar isn't recommended for repair of rubber roofs. THAT may be the real problem.

Go to Eternabond website and email those pics to them and ask for recommendations on a proper fix.
Rubber roof mfg's warn not to use a petroleum based product on their material. Hopefully its aluminum roofing material.

Give their tech folks a call.

B.O. Plenty wrote:
I doubt you will ever get rid of that mess. If it was mine, short of replacing the entire roof, I might try cutting that section out, gluing down a new piece of rubber roof material, then sealing all the edges with Eternabond tape..

B.O.

X2. That may be the easiest and best way to make the repair.
You can try a heat gun and plastic scraper but, it probably Will be a major mess.
I would cut out and replace the bad area.

That's one ugly patch you're dealing with! I'm afraid there isn't a quick repair to that one. It'll likely be a tedious cleanup and reseal or cut and replace of the membrane. Does the roof seem to be solid in the area or is it soft? If it's soft that wold lead me towards the cut and replace route.

Good thing you're in LA for the temperature although I know El Nino is about to replenish your reservoirs.

I've removed that type of roof patch and here's what I'd do if I owned it: Mask off around it with newspaper or plastic and tape. Take a hairdryer or heat gun on it and see if it will soften up. Pry it off with putty knives. If it doesn't soften, it means it was a latex based patch and you'll have to grind/cut/sand it off. When you get down to the roof membrane, clean with a solvent like mineral spirits or acetone. Wash and rinse.
Now you need to seal the leaking area and I'd suggest to use Eternabond tapes. They are expensive, compared to caulks but you'll only have to do it once and everything will be sealed for the life of your trailer.

Best of luck and enjoy any rain coming your way.

I doubt you will ever get rid of that mess. If it was mine, short of replacing the entire roof, I might try cutting that section out, gluing down a new piece of rubber roof material, then sealing all the edges with Eternabond tape..

B.O.

That looks like a very professional repair to me! NOT!!!

I would take all of the Black Tar off use a plastic putty knife, as lees chance of cutting the rubber roof. then clean, and patch with endurbond tape.