Grafix - Matte Seal - Sheet - 18x24 - Grafix Matte Seal Film is an easy-to-use laminating film with a matte finish that has a special adhesive that allows repositioning after application, and then becomes permanent. It's excellent for waterproof covering of books, maps, charts, important documents, and more. No press or laminating machine is required for use. It comes with a gridded backing for easy placement. Grafix Seal Film is 0.002in thick.