Roof Coating

Has any one used Siliconized Elastomeric Roof Coatingon the top of their TD??
We are building our own TD and are about to the point of putting the roof on . . . was just wondering which would be the best way to go: Exterior Paint or this Roof Coating.
I know the guy at Lowes said a lot of folks buy this to seal their camper roofs.
THANKS,
Susan
We are building our own TD and are about to the point of putting the roof on . . . was just wondering which would be the best way to go: Exterior Paint or this Roof Coating.
I know the guy at Lowes said a lot of folks buy this to seal their camper roofs.
THANKS,
Susan