Package closure Labels: what they are, how they work, and when to use them
- Alkam
- Feb 12
- 3 min read
Package closure labels are an increasingly used packaging solution to improve product protection and brand perception.
In this guide, discover what they are, how they work, when to use them, and how to choose the most suitable material for your application.
Introduction
In modern packaging, labels serve more than just to communicate mandatory or marketing information. They are increasingly becoming a functional component of the packaging .
Package seal labels , also known as open-and-close labels , allow you to reseal a package after opening, keeping the product protected. For companies in the large-scale retail, food & beverage, and cosmetics sectors, they represent a technical solution that combines practicality, safety, and branding.
Index
What characteristics do package seal labels have?
These are adhesive labels designed to allow multiple openings and reclosures of the package without losing adhesion or integrity.
They are applied on flexible or semi-rigid packaging and allow for:
open the product in a controlled manner;
close the package several times;
protect contents from contamination;
maintain the freshness of the product;
burglar-proof tool .
This is not a simple adhesive label, but a technical solution designed to withstand mechanical stress and repeated use.
Burglar-proof function: product safety and integrity
In addition to the classic opening and resealing function, package sealing labels can also perform an anti-tampering function, increasing the level of security of the packaging.
In some technical configurations, the label is designed to:
highlight any attempts at unauthorized opening;
leave visible signs in case of forced removal;
break or deform, if completely detached.
This means that the consumer can immediately verify if the packaging has been tampered with before purchase or during distribution.
In the food and retail sectors, this feature is particularly important because it helps protect product integrity and reduce the risk of tampering at the point of sale. For a company, integrating an anti-tamper feature into package seal labels means adding a layer of protection without altering the packaging structure.
How do flip-top labels work?
The functioning of package sealing labels is based on specific adhesives and careful design of the shape.
They generally include:
a grip area (lift tab) to facilitate opening
a repositionable adhesive that maintains its hold over time
a support resistant to creases and tears
The technical challenge is to ensure a balance between:
sufficient adhesive strength
possibility of reopening
absence of residues on the packaging
This is where the label maker's experience comes into play.
Suitable materials
Package seal labels can be made of various materials, chosen based on the type of packaging and the environment in which they will be used.
The most common face materials are:
- synthetic materials
- paper materials
- sustainable materials (recycled/compostable)
- with double layer (triplex)
Regarding stickers, the most common are:
- permanent
- removable
- specials
The choice also depends on the type of product and the surface finish of the packaging.
After having identified the best front and the best adhesive, we proceed with a stress test by applying the label to the final packaging , to verify its perfect compatibility with the packaging.
Most common sectors and applications
Package labels are mainly used in:
How to choose the right package sealer
To correctly choose a package seal label it is important to evaluate:
type of packaging (film, plastic, paper)
number of openings expected
conditions of use (humidity, cold, grease)
sustainability goals
compatibility with packaging lines
Standard and customized solutions
Depending on volumes and production needs, you can choose between:
Fully customized open and close labels , in shape, material and adhesive
Standard die-cut solutions , customizable in graphics, also ideal for companies with smaller volumes
As an industrial label manufacturer, we support companies in choosing the most suitable solution, evaluating functionality, performance and compatibility with their packaging.
FAQ
Do package seal labels maintain their adhesion over time?
Yes, if designed correctly with quality repositionable adhesives.
Can they be graphically customized?
Yes, they can include brand-consistent printing, colors, and finishes.
Are these alternatives to zip closures?
In many cases, yes, especially when you want to avoid structural changes to the packaging.
Conclusions
Package labels are a technical solution that combines functionality, user experience, and communication. They're not a secondary detail, but a strategic choice to enhance packaging without overhauling it.
Relying on an industrial label maker like Alkam means choosing a partner who can guide you towards the best solution for your product, with technical expertise and industrial vision.