I better view of the right rear! The Dometic Heat Pumps are permanently attached! I did some research on sealing the roof and I believe "Koolseal" will be used this coming spring.........its actually a rubber coating that is white, which will serve two purposes, to form a weather seal, and to reflect the sun (thermal heating) the advertisement says it cuts the sun's effect by almost 40%! 5 gallons of Koolseal will form 3 good coatings!