[mygmctruck]

Thought I would pass this along , I buy rolls of this same type product from a company called insulation 4 less. It's a 1/8" foam product sandwiched between foil , it's has much better insulating qualities and easier to work with.
It's also much cheaper per square ft . I took a sheetmetal box and lined it with this stuff , put it in direct sun lite for 2 hrs. The out side air temp was 90 that day , the surface temp of the metal box was about 120 and the inside temp stayed at 70 . So this stuff does great at what it's made for.