Shurtape reflective tape.

Alright so i have this tape at my house and am wondering if i could use it as a sub for mylar or white paint. it is shurtape i believe it is aluminum foil tape and the only reason i am asking is because i heard aluminum foil causes hot spots. here is a link to more info. http://www.shurtape.com/Default.aspx?Tabid=79&Level1=15&ProductID=3

gorilla tape is the goods but not white

Does anyone know the answer to that question about aluminum tape? How reflective is it