I have a 2008 34 FK that I purchased in Feb of 2013. The prior owner had not done anything with the sealant at the seams and tried to address leakage problems by putting eternabond tape over the leaking areas. Totally ineffective.
The factory applied sealant is minimum at best, applied in a sloppy manner over a surface that is not prepared properly.
My RV service tech lived in Elkhart IN for 25 years and worked for numerous manufacturers in the area. He doesn't recommend Cool seal on any aluminum roof. My experience with the stuff is it just gives algae a great place to live. This is how we tackled the problem:
Remove all existing sealant. A number of tools can be used, but nothing really sharp enough to puncture the aluminum. I walk on my roof, but try to stay on the roof bows which are 16" on center. After the sealant is off and areas are cleaned with paint thinner, he applied this product to all seams:
Tremco Commercial Sealants and Waterproofing
Tremco 638ssl is the product name
A W&P roof is different than most RV's, it is much more related to a heavy duty truck or trailer roof. The Tremco product above is specifically designed for the flat roofs of trucks and railcars. If it is tough enough for a railcar it is tough enough for me.
I did my roof in April of 2014. I have no more leak problems. The way the roof is designed it forms a giant pond up there after a rain. Climb up there and take a look, it will scare you to death. To further avoid problems I intentionally park the unit out of level front to back so the water drains off. Good luck