ISO 17712 Seal Standards

WHAT IS ISO 17712?

ISO (International Organization for Standardization) is the world’s largest developer of voluntary International Standards. A standard is a document that provides requirements, specifications, guidelines or characteristics that can be used consistently to ensure that materials, products, processes and services are fit for their purpose. ISO International Standards ensure that products and services are safe, reliable, and of good quality.

The ISO 17712 establishes “uniform procedures for the classification, acceptance, and withdrawal of mechanical freight container seals. It provides a single source of information on mechanical seals which are acceptable for securing freight containers in international commerce.”

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The current ISO 17712 standard requires independent confirmation in three areas:

  1.  Testing to determine a security seals physical strength (as barriers to entry). ISO 17712 defines three types of classes of seal strength or barrier capacity: “I” for Indicative; “S” for Security; and “H” for High Security. C-TPAT requires the use of “H” class seals. Suppliers must use independent third party test laboratories to validate a seal’s classification. Labs must be accredited according to ISO/IEC 17025 (General requirements for the competence of testing and calibration laboratories) to perform testing specific to ISO 17712.
  2. Auditing of manufacturer’s security-related business processes.
    Poor security-related practices can undercut the effectiveness of a high-quality security seal. ISO 17712’s Annex A defines over two dozen required practices, such as facility risk assessments and access controls to production and storage areas. Suppliers’ conformance with Annex A should also be demonstrated through an independent certification provider that is accredited to audit compliance with the ISO standards.
  3. Seals be designed and constructed with tamper indicative features that generate tell-tale evidence of tampering.

Security Seal manufacturers must be able to demonstrate to, and obtain certification from, an accredited auditor from an independent third party organisation that their high security seals have built-in tamper evidence features. If an independent third party organisation accredited to ISO 17020 verifies conformity, it will provide the manufacturer with a certificate of compliance that documents that the seals submitted for review do reflect tell-tale evidence of tampering generated by attempts to defeat a correctly closed and affixed seal.


2K Klicker Bolt Seal

The 2K Klicker is the first container bolt seal in the world to feature a unique two colours in its design. The 2K Klicker is a high security bolt seal, certified to ISO 17712 Clause 5 and 6.

MCLZ 500 Cable Seal

The introduction of Mega Fortris’ new MCLZ range of cable security seals is a major step towards improving the security of the global supply chain.


ISO 17712 “H” High Security Seal Typical applications of the MF Bar seal include shipping and inter-modal containers.