Yeah it does but it's actually one of the things I like about this is that it's easy to take down. Besides after a few grow and the amount that you wipe your mylar down you may need to replace it after a few grows. I know each time I clean my mylar a bit of the silver coating comes off too so reflectivity may be diminished any ways.Only thing I didn't like about this stuff is that it wears out after a couple of grows. I don't know if it's from the heat of the lights, or just me cleaning down the Mylar.