A friend of mine bought a new MH with a FG roof and gave me a gal of Kool seal and primer. I put it on in 2005. It looked great for about 4 years. I only had enough for one coat. I clean it every time I wash the MH. I power wash it once a year also and it is still on but it is wearing thin. I think the greatest cooling effect is from the white reflective acrylic or what ever the various coatings use. I cant see that .030 of any coating would be thick enough to add any R value. For something to be R 16 it would have to be a lot thicker than .030 to have any effect on cooling.