rubber roof sealants

I have used the Dicor acrylic sealant on two different units over the last 10 years. It functions well and last for a time. I now own a 4 yr old Class C and just recently recoated the top (rubber roof) with the Henry's Tropicool 100% silicon. I can say it does a phenomenal job. It adheres extremely well to the surface and looks like a brand new roof. It is said to be much better than the acrylic material that Dicor sells which last in my case only 2-3yrs at best. I added two coats of the Tropicool silicon and it makes a tough and smooth finish to the rubber membrane. Don't think you can go wrong with this one. Not so expensive if purchased in the 5 gal size but also available in the 1 gal as well from Home Depot and many others. Check the Youtube site for RV coating.