Security tape offers a positive control on unauthorized interference with any package content; it also provides an excellent visual theft deterrent. All printing and numbering is under the surface of the security tape making it impossible to remove or alter and as the surface of the product is siliconized, it is not possible to re-seal if it has been cut open. This is a 'self voiding' material that separates permanently as a de-lamination if attempts are made to lift or remove the security tape from any package.