Just go to home depot and buy 4'x8' sheets of 1/4" white board for $11.00 each. sturdy, no painting, easy to clean.

I built mine out of this stuff and before I sealed the cracks with aluminum tape any light leak was like a laser beam with a 600w mh in a 4'x4'x8' box. Mylar is only an added expence that is not needed IMAO.
Jerry Garcia 2007 Reviewed by Jerry Garcia 2007 on . No Mylar at Home Depot or Lowes...Where else can i get it?? Hello Peeps, Been looking for mylar and no luck, i have been to 4 HD and 3 Lowes and none have it... Can anyone help??:( Rating: 5