A Bolt seal Tamper Proof Seals is a type of security seal that helps to protect goods from being stolen or tampered with. The seal is made up of a metal or plastic material that is Metal-Laced and has an adhesive strip on the back. The strip is put over the opening of the container, and then the goods are placed in. Once the goods are in, the adhesive strip prevents anyone from trying to remove them without first being able to secure them.