Creating a new area/spitting up a area. Whats best cloth/plastic

I know I have seen it somewhere on here before, but been searching for over 30 minutes and no luck. Whats a good light proof cloth or plastic sheet I can hang to create a new area inside another one? Its a white plastic cloth that I could have swear I have seen used but have no idea whats its called anymore. Tarp or something arggg its killing me!

http://www.specialtygardensupply.com/servlet/the-11866/Black-&-White-Poly,/Detail

^^^ There ya go...some call it panda plastic, or simply just "poly"

I use panda film too, best for lightproof reflective material. It is my walls between my rrom and the door leading to that room. Worth a few extra bucks if you can seal the seams up nice.

Yess saviors hahaha. Thanks guys xD But anything cheaper that would work too? =X

Panda plastic works great for me it keeps my flower area dark when the veg lights are on

Dude you can almost build a 6x8 wall for $10-15 its worth the cash because anything less puts your hard work to waste. buy the good stuff now and smoke your rewards later

if you dont need to keep outside areas dark, the safety blankets they sell at walmart would work for like 2$ a piece. look in camping section.