Pres-OnŽ Self-Stick adhesive coatings are fast, easy and safe, and are available in Hi-Tack and lo-Tack (repositionable). All Pres-On adhesives are acid-free and Ph neutral, so your images will look great for years to come. Simply peel off the protective liner paper, attach your image, and enjoy. Self-Stick Mounting Boards are available in a variety of thickness.