This is very interesting in that it also collects water. I have been following a scientist’s series as he has been researching infrared cooling paint that has gotten similar, if not better results in terms of cooling: youtu.be/KDRnEm-B3AI, along with hydrophobic coatings for other purposes.

It is a great idea to combine those two things and look into how much water a fully painted roof can provide though, so I’ll look into passing this paper along to him.