What are High Security Seals?


High Security Seals are one of three major classifications or categories of security seals and offer the greatest level of protection of any type of security seal. High Security Seals are generally made of metal and are designed to provide a barrier to entry and indicate tampering. As the strongest seal type, High Security Seals must conform with standards used by the U.S. Customs-Trade Partnership Against Terrorism and the World Customs Organization.


Including both cable seals and bolt seals, High Security Seals are also called “barrier seals, because they provide a barrier to entry.  Because they are made from metal, they require special tools to be removed, including bolt cutters or cable cutters. Designed to prevent the theft of high value goods as well as tampering and pilferage, High Security Seals are ideal for use in protecting the contents of high valued goods. They can also be branded and marked for improved tamper resistance and tracking.


Current standards for High Security Seals


In the wake of the terror attacks on September 11, 2001, U.S. and international standards for safe shipping were enhanced. Today’s High Security Seals must meet standards established by the International Standards Organization (ISO), the U.S. Customs-Trade Partnership Against Terrorism (C-TPAT) and the World Customs Organization.


High Security Seals must be rated as such based on the standards of ISO 17712. This document establishes “uniform procedures for the classification, acceptance, and withdrawal of mechanical freight container seals” and “provides a single source of information on mechanical seals which are acceptable for securing freight containers in international commerce.”


In 2013, the International Standards Organization published the latest version of ISO 17712 standards. Major revisions centered around a section of the document related to evidence of tampering. These days, High Security Seals must be certified as meeting the standards established by ISO 17712:2013.


The current ISO standard for High Security Seals requires certification in three different areas: 1) physical strength, 2) manufacturer procedures, and 3) and tamper indication. As a result, High Security Seals must be tested by accredited third-party labs for strength. In addition, seal manufacturers must have their security practices examined and certified as compliant. Lastly, all High Security Seals must offer clear, reliable evidence of tampering.


High Security Seals and international trade  


The Customs-Trade Partnership Against Terrorism (C-TPAT) program is part of the U.S. Customs and Border Protection’s multi-layered strategy for securing cargo intended for import into the United States. Through C-TPAT, the U.S. government works with trade and shipping companies to strengthen international supply chains and improve border security.


According to current C-TPAT rules, High Security Seals “must be affixed to all loaded containers bound for the U.S.” In addition, C-TPAT standards require that all such seals “must meet or exceed the current ISO 17712 standards for High Security Seals.” 


TydenBrooks: Your High Security Seal experts


With more than 145 years of security experience, TydenBrooks has a long history of helping transport and shipping companies move goods securely, maintain regulatory compliance and protect their businesses. We offer a wide range of High Security Seals, with designs to meet all your unique security needs and applications.


High Security Seals made by TydenBrooks are C-TPAT and ISO 17712 compliant. Our lineup includes both bolt and cable seals ideal for protecting cross-border shipments, and high-value cargo as well as trailer and container door latches. Our patented C-TPAT High Security Seal technology provides our customers with the assurance that the high security seal they choose can reliably be used to create shipment audit trails.


High Security Seals like the Sealock offer the highest levels of security by immobilizing locking doors while at the same time locking the door latch. The Sealock SL is a hybrid cargo security device consisting of a barrier locking bar plus a cable seal. The device requires two cuts for removal and exceeds all ISO 11712:2013 standards.


The Sealock SL-C is a dual-sided large diameter cable seal that also seals and locks both container doors together and prevents the most common forms of covert intrusion and tampering while still exceeding C-TPAT standards for High Security Seals. 


The EZ Loc Plus 1/8 is an ISO 17712:2013 High Security Seal and C-TPAT compliant. This product features a non-preformed security cable that frays when cut with various marking options for customized tracking. The seal pulls tight for maximum security and can only be removed with cable cutters. 


In addition, bolt seals like Snaptracker and Intermodal are C-TPAT compliant for cross-border shipments and meet ISO 17712:2013 standards. Requiring bolt cutters for removal, these bolts provide superior strength and tampering deterrence. The new Flex Bolt seal is made from galvanized aircraft cable, making it more pliable than traditional bolts while still meeting ISO 17712:2013 standards.




High Security Seals are widely used across the U.S. and around the world to protect truck, rail and sea cargo shipments. And High Security Seals play an increasingly important role in protecting the free flow of goods being traded and shipped internationally. 


As the global leader in High Security Seals, TydenBrooks is helping many domestic and international companies move goods safely and securely, not only within nations but also across international borders.


For more information or to discuss your unique needs for High Security Seals, contact TydenBrooks at 1-800-458-SEAL or via email at info@tydenbrooks.com. We look forward to helping you protect your cargo, maintain regulatory compliance and expand the success of your business.