Like blink says aluminium foil will cause problems, do not use it.

White paint is ok but not nearly as good as mylar.

Try to get domed or diamond mylar, its the best.


Holland Hydroponics - Reflective Material reflectivity chart

ignore the poly and film , they may melt
BeforeYourTime Reviewed by BeforeYourTime 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