Actually not mylar, that stuff is easy to find/search and works well. But in that video, they say they are using "pvc foil" to coat the walls...
Twentyinches Reviewed by Twentyinches on . pvc foil? I was checkin out how ppl set up grow rooms for ideas...and came across this video.. But I can't figure out what that stuff is he used to line the walls? pvc foil? ive searched this and nothing... YouTube - how to grow marijuana at home-part 1 Rating: 5