free stab seal samples
http://www.stabseal.com/order.html

Apply the Stab Seal™ to your own packaging and allow it a few minutes to bond. Once the package has been opened or the Stab Seal™ tampered with, you will see that the ****llic silver breaks and leaves a message impregnated into your packaging. This message is encapsulated using our patent pending technology to ensure the removal of the void text is extremely difficult both with chemicals or additional aids.