they are in the camping section at WM,and reflectix in Hm Dpt is way expensive but it does ad some insalatory value. I used in a van to keep the cooled air from heating up from the side metal,also dead'nd the sound. It is wrapped around a 55 gal drum of nutrients to keep temp moderated.peace
walterpklondike Reviewed by walterpklondike on . $1.98 For 82x54" mylar sheet @ Wal-Mart In my area there aren't a whole lot of places to get any growing supplies without driving to Austin, but turns out Wal-Mart has mylar for pretty cheap. Just go to the camping and grab the emergency blanket that they sell for 1.98. Its an 82x54" sheet of mylar and depending on how big your room is 2 or 3 should be enough, the tiny box unfolds into a huge sheet. It's perfect for lining your box, and is a lot more reflective than foil. Rating: 5