For an older neat thing that folks don't tend to know about, check out pyecrete. I use it structurally in the dead of winter, and all summer long for cooling.
/johnny
I used the paint when I floored the attic space above my garage. My AC broke a few weeks ago and the coolest room in the house was the garage. Amazing stuff. ( also, the Carrier Infinity System’s a great AC) I’ll check out pyecrete ... Thanks :)