Think about it. A white floor in a grow space used for growing organic plants with the use of water/ and or soil. Sounds like it will not stay white for too long. I used a heavy duty silver tarp bought at Home Depot. It is smell proof, water proof, won't rip and is a wise color because it still has some reflective quality and hides dirt well.
I like the panda stuff too. This just seems to last a tad longer but is not white so less reflection.:thumbsup: