No Glue, No Mess - Easy Handling - Repositionable - Supreme Adhesion - Brilliant Image Quality - Excellent Durability UltraPro Blue Self Adhesive Photo Resist Film makes decorative sandcarving simple and enjoyable. UltraPro Blue has been designed for both the beginner requiring ease-of-use and the professional demanding quick processing for high production. This easy handling film has an inherent adhesive that does not activate until the film is washed out. Even when the adhesive is activated, the film is repositionable until firmly applied to a substrate. This film absorbs moisture once applied to the glass. Must be left for at least 60 minutes to achieve maximum adhesion.