I couldn't get a good read on the product with my phone. But it appears to be a "rubberized" coating for non-rubber roofs.
My recent MH has a rubber roof and as far as I know, you do not coat or seal them, you only wash them 1-2 times a year and perhaps some spray on UV protectent made for them.
There are also 2 kinds of rubber roofs. The names of the 2 different compounds escapes me right now.
You definately want to determine which kind you have before doing anything to it.
It might be best if you post your reason for wanting to use this stuff, then the experienced can point you in the right direction for your needs.
John & Clare - Buck & Zeus - Jack & Husky
2008 Fleetwood Bounder 38P
Towd: 2 HD Streetglides