Our durable 6.7 mil diamond foil is the best of the best when it comes to grow room reflectivity. The highly reflective diamond textured material prevents hot-spots and disperses light evenly. Waterproof construction means that this material can be used to protect both walls and …floors from spills, dirt, mildew, and stains. Diamond foil is also more durable than standard Mylar, and will not smudge, crease, crinkle, or scratch when washed. Shop now for some top-tier reflective film at rock-bottom prices, only through HTG Supply.