The Silver Foil Inkjet (SI) has a facestock that is 4.5 mil +/- 10% in thickness and a 55# liner that is 3.0 mil +/- 10% thick. The material features a permanent, acrylic-based adhesive that works well on most surfaces. If you'd like to try samples of this product, you're welcome to visit the link below to request a few sheets at no cost. https://www.onlinelabels.com/samples