High-Security Container Bolt seals are the most popular types of barrier seal for the secure transportation of shipping containers, trucks and trailers during customs movements, including the customs border between the UK and EU post-Brexit. Locktainer bolt seals are ISO17712 'H' High Security certified and C-TPAT compliant, offering the highest protection for cargo security across the world. Our barrier seals are accepted by UK, US and EU custom authorities, and are regularly retested for compliance with ISO17712 certification standards. The Locktainer 2020 bolt seal has SSTA certification and is accepted by HMRC in the UK as a Group 1 customs trader barrier seal. We can supply sequentially numbered items from our UK warehouse, or can offer you a bespoke marked barrier seal with your own organisation requirements, including company logo, bespoke numbering and/or barcoding, and bespoke colours.