Thermoflo Black & White Premium Poly Grow Media support plant metabolism and contribute support plant metabolism and contribute towards improved plant vigour 3" w this self contained package of exceptional products includes everything required to set you on the right course for gardening success Thick 6mil poly sheeting Reflects 90% of light back to crops on the white sideBlack side absorbs lightCan be used to partition and waterproofApplicationsDust barrier to protect walls equipment and other clean surfacesExterior scaffold coverRoom separator dividerConcrete curing coverCovering for large materials outside for weather protectionInstant all purpose coverInterior moisture barrier insulator for unprotected windowsPainting drop cloth: use to cover carpets and floorsWaterproof exterior storage coverCamping tent coverSun shield reflects heat (white side)Landscape nursery ground cover for level beds to prevent weedsCover beneath decks