I think you wan to call it "Rubber roof coating" not paint.
I use Inland coatings RC 2000. First I was just going to use it around vents, flashings etc. But after seeing how it went on and looked I did the whole roof. In their web site they did a couple commercial buildings in my area that gets a lot of rain, and their product held up good on my stuff. The only thing I don't like is it took longer than I thought it should to dry. Don't know if it was because I put it on pretty thick or weather or what. It has been holding up real good. Messing with the A/C, getting it out and back in by myself was my biggest hassle. I had some tinted to match our older RV that is a carmel color. I called Inland coatings and they said any standard brands paint store can stain to "their 855 or 955 series". Out of can it looks just like any other roof coating (polar white color). I called around and was able to get for $85.00 a gallon. Store wanted $128.00 when I first called them. Smallest size was gallon and no way was I going to pay that much, store said OK $85.00 I've done a 5th wheel 37 feet and 33 ft trailer and 26 foot class C and have about 1/4 left of gallon. So a little goes a long way. I used a paint brush so don't know about using roller. Check out their web site. They have numbers for scientific stuff that I have no idea what they are really saying. Other than I think temperature has a lot do with drying time. Maybe you might be able to tell what they are getting at by looking at there spec sheets. I was made aware of this product by a guy that has an RV rental fleet. If you're still interested after reading the spec sheets send me a PM and I'll explain what I used to remove old caulking (I didn't peel or scrap for months) and what I used to wash the roof prior to using. I think prep work is very important. What convinced me to give it a try was him telling me "a monkey can put it on and not mess it up" OK I'm interested.
Now only if some RV manufacture would come out with a roof system that is like a big coffee can lid and just snap a new lid on every 10 years, I would really be interested.
http://www.inlandcoatings.com/rc2000.htmNobody has asked me what I used on roof. Looks just like the true RV stuff. This stuff hasn't peeled or bubbled like the dicor stuff I used about 5 years ago did. (No I'm not connected to them other than I like their product)