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Security seals can help to protect your cargo, valuable assets and confidential items. They serve an important role in loss prevention through reducing the incidences of theft, fraud and lost goods. Every year, hundreds of millions of pounds of valuable cargo is lost in such ways – and seals are one way in which these losses can be prevented at a tiny fraction of that price.
However, your cargo and your business are only protected properly when security seals are used as part of your wider supply chain, and due consideration has been made to the complete security of your logistics operations. Most risks which security seals are designed to mitigate – theft, pillage sabotage, smuggling etc – are human behavioural issues, and as such just as much attention should be paid to the humans involved in your security processes as to sourcing the appropriate seal itself.
No matter how well a security seal has been designed, seals only work if you have security at both ‘ends’ – at the point of sealing and at the point of opening – which in turn relies upon the security and reliability of your people. This goes to the very complex issue of organisation’s values and management systems, and how these are communicated to everyone working in the organisation. This of course goes beyond the scope of security seals, but what we can do below is to outline useful pointers to consider when setting up your protocols for security seals and how they fit into your wider supply chain.

The ‘onion skin’ principle is very useful when considering security measures – the idea being that an organisation should have a layered approach to security, so that if one security measure fails, then another will not. For example, consider combining security seals on a larger enclosure such as trailer doors, with security labels on smaller enclosures, such as pallets of cargo or even individual cartons of product.
This can apply not only to physical layers of security seals, but also in security methodologies applied. For example, CCTV in areas where seals are stored, sealed and opened will help you to identify suspicious activity or instances where personnel are not following agreed security protocols.
Consider this question: which individual within your organisation is responsible for the purchase of security seals? What would happen if a bad actor within your organisation ordered “copycat” seals for their own nefarious activities and started to use them... would you have systems in place to identify this? Are you using a reputable manufacturer of security seals who have systems to help? This is to illustrate the point that even before security seals have arrived on site, you need to be mindful that seals can be a target for fraudsters. Security seals can act as a false positive that all is well with consignments, and therefore are of value to individuals attempting to hide tampering. The risk increases once seals have arrived to your location, where they are at physical risk of interference. Would you notice if a box of seals was taken by an opportunist?
To minimise risks, security seals should be stored in a secure storage area, ideally with limited access by senior members of your team, and covered by CCTV to pick up any out of the ordinary circumstances. It is recommended that particular seal number ranges are allocated and distributed to designated teams in appropriately sized batches, as necessary for your operations. This can provide a tight audit trail and help to identify vulnerabilities as and when seal tampering / anomalies arise.

Allied to the above is the importance of recognising that seal numbers are important data which should be collected, collated and stored in a secure way as would be the case with any other type. Keep a controlled record of security number ranges being dispensed out and account for every seal being applied using a documented system.
Using barcoded seals can be useful and is increasingly common. Barcodes can be integrated with barcode readers on PDA’s for automated incorporation into your processes, and reduces the likelihood of human error. If you are using a paper-based system (as is still common for road manifests and bills of lading), make sure that a consistent process is followed, and make copies for archival where appropriate. Consider using seals with duplicated barcode labels on the reverse, which can be simply applied to corresponding manifests / paperwork, rather relying on rewriting or rekeying seal numbers.

Our seals are highly customisable and can be produced in different colours and with different markings – we can print QR codes, data matrices, logos, barcodes, and many other types of information. Consider using a system of colour or marking rotation, be that on a periodic rotation basis, or using different marked seals for different operations or teams.

It almost goes without saying, but physically checking seals for tell-tale signs of interference is all-import for the integrity of your supply chain. Fraudsters are ingenious and will try many ways to defeat seals. We produce a ‘known methods of intrusion’ document, available to Universeal UK customers, which can help you to recognise and train your staff in the ways that bad actors attempt to circumvent security seals. Please speak to your Account Manager for further information.

Loss prevention and security protocols can only ever be as good as the team implementing them, and efforts need to placed into educating appropriate staff members on the correct way to handle, seal, open and dispose of seals appropriately. Once trained, there should be formal repercussions for failing to report issues with seals as they arrive, for example a failure to report mismatched seals on consignments, anomalies, failures to apply seals, and so on. A system of escalation should also be implemented – if particular members of staff are engaged in a pattern of behaviour or regularly failing to adhere to protocols, this should be flagged and reported to senior levels of management for investigation.

Legislation does and has changed over the last few years, and we recommend using reputable security seal manufacturers who have been long-established and are well-acquainted with industry requirements. Universeal UK is a participating member of ISMA (the International Seal Manufacturer’s Association) and also in the ISO committee responsible for seal standards. We are at forefront of the development of security seals and tamper-evident packaging. We regularly post updates about developments in the field and best practices to our customers, so that they can ensure they are using security seals appropriately.
We hope this guide has been helpful... read on for a full of glossary of terms! Contact us to discuss your security needs today – email [email protected] or call us on +44 (0) 1829 760000.
This article is the third of four, looking at how security seals can fit within your wider security protocols. View Series below...
With the range and breadth of security seals on the market, it can be very challenging for the uninitiated to know which seal to choose to best suit their needs. From the outset, it is recommended that the decision-maker considers the purpose of the security seal in relation to the application. Considering some of the fundamentals from the outset will help to select the right seal for the job…
…why is the user sealing the enclosure in the first place? Is it for loss prevention, safety purposes, product integrity, brand assurance...?
…what type of goods will be protected? What is the value of the goods?
…where is the seal going, and how? Cross-border shipments are subject to customs regulations which will affect the seals that can be used
…what kind of resistance is required? What are the consequences should if the security seal has been broken or tampered with?
…what environment is the seal being used in? What is the operating temperature? How long does the seal need to last for?
Answers to these questions will have a bearing on the material, form, shape, strength of the most appropriate security seal.
It should also be noted that a security seal alone cannot provide an iron-clad guarantee of integrity. No manufacturer anywhere in the world can say with complete certainty that – given enough time, appropriate circumstances, resources, skills and ingenuity – their security seals are undefeatable... but this is also true of safes, door looks, padlocks and alarms. Security seals should always be used as one layer within an ‘onion skin’ of security (view our guide to security protocols).
With this said, below we note some key characteristics of seals you should consider when choosing the most suitable. Try out our handy filtering tools shown on our main security seals category to find a product matching your needs.
| Seal Feature | Considerations |
|---|---|
| Design Type | Seals come in many forms... Pull-through Security Seals, Fixed-Length Security Seals, Security Padlock Seals, Barrier Seals (Cable Seals and Bolt Seals), Wire/Rope Meter Seals, and even Reuseable Electronic Seals. Security seals also include security tapes and labels, suitable for flat surfaces and edges on enclosures such as crates, cartons and pallets. Each type is designed for particular types of applications - for more information, see types of security seals. |
| Physical Fit (Diameter, Length and Flag Size) | Each security seal will have a particular tail or hasp diameter, an effective useable length, and a standard flag size for visibility of printed identification markings. Narrower seals are useful where seals must fit into smaller apertures, and for this many of our pull-through seals have smaller diameters, such as the MiniLock 570's 1.4mm tail thickness and UniTite 414's 2mm thickness. We also offer extra long seals, such as the UniStrap 412-XL (overall 51cm length) and UniTite 413 (overall 49cm length). In terms of flag size ("marking area"), we offer specialised security seals such as our UniFlag Security seal, which has a large format (108x56mm size). |
| Material | Common materials in use for security seals are polypropylene, nylon, aluminium and steel. Polypropylene is a popular choice for pull-through seals, as it offers a combination of strength, flexibility and wide operating temperatures. However, all types of plastic do become brittle at increasingly low temperatures, and do degrade when exposed to UV light, long-term saltwater exposure, solvents etc. Metal aluminium and galvanised steel cable seals provide more durability and strength where circumstances dictate, and we can also specify stainless steel cable grades for most demanding applications: see our Flexigrip 150M and Flexigrip 325M models. |
| Strength | Seals are specified for particular strengths – for certain applications such as fire extinguishers, kit bags and first aid trolleys it is desirable to have a very low break-strength so that seals can be broken in an emergency – for others, for example mail sack security seals, it is important that seals with strong break strengths are used so that bags do not burst open when under tension. There is a wide range of tensile strengths available, from 5KgF all the way up to 2000KgF, so understanding the possible forces relevant for your application is important for specifying the right kind of seal. |
| Level of Tamper-Evidence | We categorise our security seals as having either a Low, Medium or High degree of tamper-evidence, based on design and construction features, method and material of construction, and level of certification. |
| ISO Classification | Linked to the above, higher levels of security seals are often required for international freight movements - in particular, High Security Seals as classified under ISO17712:2013 regulations for international shipping container and freight movements. |
| Removal Method | Some applications require easy-access into a sealed enclosure, and for this we have security seals that can be removed easily by hand, either with low-break strengths (see our Fireseals) or tear-line features (see our Tracewaste Tear-Off and UniStrap 412LT). For other requirements, security seals need to be robust and should not be removed intentionally without simple tools such as scissors or tin-snips, such as our UniTite 413. In other scenarios, particular for barrier seals, we have our heavy-duty cable and bolt seals, products such as our Flexigrip 325M, Flexigrip 500M and Fork seals which necessitate the use of heavy-duty cutting tools like bolt croppers to remove. |
| Sustainability | Sustainability should of course be at the heart of every business, and security seals should be no exception. All of our plastic security seals are 100% recyclable, and we are increasing options for recycled content and biodegradable security seals on a regular basis. |
Universeal UK has been supplying security seals since 1992, and we are one of the leading organisations in the industry. Please email [email protected] for more information on our range and how we can assist. For advice on using security seals within a wider security program, please continue reading our next article in the series, Security Protocols: Making Security Seals work for You.
This article is the second of four, looking at how security seals can fit within your wider security protocols. View Series below...