When I was growing up (in a desert town) we had a house with a flat roof. When we bought it, it had tar based black sealant painted on top of it, and it was hel

When I was growing up (in a desert town) we had a house with a flat roof. When we bought it, it had tar based black sealant painted on top of it, and it was hell. The next year we covered it with white polymer based sealant, and the difference was huge.