staying cool - spray roof w/Ceramic heat resistant coating?

[nearhomeless]

http://www.tcceramic.com/trailers.htm

Wonder if anybody was familiar with this or it's claims... it's used on reefer trailers. If the description is accurate it might be as good as being in the shade even when youre in the blazing sun?

[Vern1]

Greetings,
I used a roll-on version when I did the roof on my bus about 5 years ago.
I did notice a small reduction in inside temperature over the next few days.
It's still on there and holding up well and has been in the sun the whole time.