Rated 2 out of 5 by SPPJD from Not 100% Opaque Purchased this product vs another that we've used before and under normal lighting conditions, it appeared as if it would work great but once on-site we realized that there was still a significant amount of light being transmitted through the material. Light passing through is visible on the sign box and appears brown when lit up at night. This defeated the overall look that our client wanted and expected. May be best for small low light wall-mounted lightboxes but not for commercial use. We've learned this lesson the hard way!