This is a self voiding tape. When seal is broken a hidden message indicating the package has been opened will appear and tape cannot be resealed. Used For All Types Of Packaging, Works On All Surfaces (Boxes, Cartons, Totes, Luggage, Corrugated, Plastic, Cardboard, Wood, Metal, Drums, and More) Can Be Applied By Hand, Tape Gun, Or Mechanical. TSA APPROVED FOR INTERNATIONAL SHIPPING This Is The Most Secure Tape In The World And Is The Best Option For Your Secure Packaging Needs. Sells on Average For $40 Roll in Most Retail Catalogs.