In times when product safety and customer trust become key, tamper-evident seals play an increasingly important role. They protect against opening, counterfeiting and tampering, while at the same time becoming an elegant element of packaging. Thanks to modern printing technologies and heat-shrink materials, a seal can serve not only a protective function but also a marketing one — informing, decorating and reinforcing the brand image.
What are tamper-evident seals (tamper evident labels)?
A tamper-evident seal is a special packaging element that allows detection of any attempt to open or breach the packaging.
In the case of food, pharmaceutical, cosmetic or alcohol products this has great significance – it allows preservation of the product’s integrity and guarantees to the consumer that it is original.
These types of seals are produced from heat-shrink calendered film (oriented PVC) or PET film. Once heated, the material shrinks and tightly adapts to the shape of the package, creating a secure and durable closure.
Thanks to this, any attempt to open leaves a visible trace – and the customer has confidence that the purchased product is untouched.
Application of guarantee seals in industry
Tamper-evident seals have found wide use in many branches of industry, including:
- food industry – protecting against contamination and loss of freshness,
- alcohol production – safeguarding excise while keeping it fully visible,
- cosmetics and pharmaceuticals – preventing opening or tampering during transport and storage,
- chemical products – guaranteeing user safety and correct dosing,
- electronics and household appliances – serving as warranty seals, revealing any interference with the device.
Where quality, cleanliness and product originality matter, the tamper-evident seal becomes an integral element of packaging.
Construction and properties of a heat-shrink seal
The seal produced by B-G is made from high quality heat-shrink PVC film with controlled shrink parameters, or from PET. The PVC material has several important advantages:
- flexibility – adapts to any bottle or container shape,
- high transparency – allows display of labels and excise marks,
- excellent print quality – full-colour branding on the entire surface,
- durability – resistant to moisture, temperature and mechanical damage,
- safety – visible traces after attempted tearing.
By using appropriate machines and films, B-G’s seals maintain an ideal balance between aesthetics and protective function.
The seal as an element of brand identification
More and more often the guarantee seal also becomes a marketing medium. Full-surface printing of the film allows placement of a logo, brand name, advertising message or a QR code leading to the producer’s website.
This simple solution allows to:
- increase brand recognition,
- provide the customer with additional information about the product,
- stand out on the shop shelf.
Combined with other packaging forms – such as shrink-sleeve labels or duopacks – the seal creates a coherent and professional product presentation.
Examples of B-G’s seal applications
- Seal on an alcohol bottle – protects contents and excise mark, while preserving aesthetics.
- Seal on a jar or cosmetic – serves as a warranty closure.
- Seal on a food package – ensures hygiene and safety during transport.
- Seal on an electronic device – signals any attempt to open the housing.
Each of these can be customised, and thanks to the flexographic technology at B-G’s printing house – produced in colours consistent with the brand’s visual identity.
Tamper-evident seals and legal regulations
In many industries, the use of warranty seals is not just a recommendation but an obligation resulting from regulations – e.g., in alcohol trading, pharmaceuticals or chemical products.
The use of tamper-evident seals helps manufacturers meet the requirements of BRC Packaging standards and CLP labelling guidelines.
This means that by using B-G’s tamper-evident seals, a business not only protects the product but also fulfils the legal and quality requirements in force on the European market.
Aesthetics and functionality – combining security with design
The high transparency of the film means that the seal does not obscure the label or contents. It can be combined with a coloured label or print, so that the whole is aesthetic, coherent and modern.
Thanks to 360° printing capability, the seal also serves as micro-advertising – subtle yet effective.
In this way, product protection becomes simultaneously decoration of the product.
Custom tamper-evident seals – tailored to brand needs
Many companies today opt for custom tamper-evident seals which not only protect the product but also emphasise its character. Personalisation includes e.g. choice of film colour (transparent, matte, metallised), printing of logo or serial number, inclusion of QR code, and even non-standard shapes.
Such solutions increase security – because each lot of seals is unique – and make packaging counterfeiting more difficult.
For premium products, a personalised seal becomes part of the brand’s image, not just a safeguard.
Printing of tamper-evident seals – technology and production quality
At B-G’s printing house the warranty seals are produced using flexographic printing technology, which allows durable and precise prints. Special UV inks provide resistance to abrasion and moisture, and reproduction of brand colours remains perfect.
In this way, B-G combines the functionality of protection with attractive design, tailored to the requirements of producers in the food, cosmetics and chemical sectors.
Tamper-evident seals in logistics and e-commerce
Tamper-evident seals are increasingly used also in the e-commerce and logistics sector. They help check whether a package has been opened during transport. Stickers with tamper-evident effect or protective printed tapes increase customer trust and reduce the number of complaints.
Such a solution works especially well for shipping electronics, cosmetics and supplements – high-value or delicate-structure products.
Tamper-evident seals in eco-friendly packaging of the future
The ecological aspect is crucial today. Modern heat-shrink films used at B-G’s printing house can be made from recycled or biodegradable materials, thus combining safety with environmental care.
This is an important direction for companies striving for sustainable production – particularly in the FMCG industry, where pressure to reduce plastic and CO₂ emissions is growing.
FAQ – Frequently asked questions
Does a heat-shrink seal fit every package?
Yes – it adapts to different diameters and shapes of containers.
Can seals be printed in full colour?
Yes – B-G’s flexographic technology allows full-surface printing, including transparent areas.
Does the seal protect against product counterfeiting?
Yes – every attempt to open leaves a permanent trace, which protects the product from reuse.
Can the seal be combined with a sleeve label or duopack?
Of course. This solution is often used for premium products and promotional sets.
Conclusion
B-G’s tamper-evident seals are not only a guarantee of quality but also an effective marketing tool. Thanks to modern materials, personalisation and flexographic printing technology, they represent a combination of protection, aesthetics and functionality.
They work equally well in food, cosmetics, chemical and e-commerce sectors — wherever customer trust and product protection matter.