Our saloon roof is in need of repair as well, but don't have the time to tackle it right now. We recently applied a liquid rubber RV roofing compound in the hope it buys us a few years before the serious task of a permanent repair/rebuild is done.
We used Superior RV Roof liquid rubber roof coating. It was the strongest one with the most flexibility over the widest temperature range I could find.
Here's their claims:
The Strongest and Most Durable RV Roof Coating
1900 psi Tensile Strength
One Part Thermoplastic - No Catalyst – Ready to Use
No Tape Required
No Primer Required
Seals Out Ponding Water on Flat Roofs
90% Solar Heat Reflective
Adheres Directly to TPO, EPDM, & All Other Surfaces
Resists Hail Impact & Dirt Pick-up
Remains Flexible Below -70ºF
Rain Will Not Harm Uncured Product
Will Not Support Mold Growth
Rain or Frost Will Not Damage Uncured Product
15 Year Product Guarantee
I bought enough to lay it on thick as they suggest, but only put two thin coats on so far so the textured walking surface wouldn't get smoothed over. Areas where there were penetrations (mast step, hand rails, etc) got three coats with a small brush at the seams to fill all gaps. So far, so good.
Don't know if it's going to last, but it's a pleasing white that's easy to clean.
Like I say, not the "proper" way to deal with the problem, but if it buys me 3 to 5 years, great!