
Sealester
About us
Sealester is a start up at the origin of a new sealing technology : the digital sealing. Thanks to this new process, it is now possible to innovate in the flexible packaging universe, through new forms and new eco-friendly materials (recycled and recyclable).
Let's reinvent the packaging and go beyond the standard, right down to the services.
It is through different counter .... that the Sealester team guide you in your production. Whether it is to built and clarify your project or for the creation of new packaging form, our team is ready to help you ! We adapt us to your wishes in taking into account about your constraints and those of your suppliers to realize the packaging that will best represent your brand identity.
Discover our booster, design and series offers to dynamize your conception !
With Booster, we resume with you your wishes of standard formats in letting you the access to our raw materials selection.
With Design, discuss with our packaging experts to create from A to Z, THE innovative packaging. It is right after established your specifications that our team will be creative in your project.
Until the series, we advise you on the ideal type of production. We are capable to produce mini, little and middle series.
Thanks to our technology, we can make prototypes with our without printing in the way to help you to project you and to validate each one of its characteristics before the production launch.
What are you waiting for creating the packaging that you really need ?
Products & services

Sealester Flex - Innovative and Tailor-Made Packaging Solutions
Our expertise in flexible packaging is your greatest asset for turning your ideas into tangible results. With our solutions, you can streamline every step from design to production and benefit from personalized support to create packaging that perfectly reflects your brand identity. Why Choose Sealester? - Flexible Pouch Specialist : Whether it's Doypacks, spouted pouches, or custom-cut designs, we create tailor-made packaging solutions to meet your specific needs. - Cap Integration Expertise : We specialize in adding caps to all types of materials, including recyclable films like Mono PE, with caps of various materials and diameters ranging from 8.5 mm to 35 mm, tailored to a wide range of project requirements. - Custom Adaptation : We design pouches with personalized shapes to meet your needs, while considering the constraints of your production and filling processes. - Cutting-Edge Technology : Our machines are configured to produce volumes suitable for all types of projects, starting from as little as 5,000 units. Whether you need small batches or larger-scale production, we guarantee optimal quality at every stage. Sealester combines expertise and innovation to design high-performance, unique, and brand-respectful packaging. Let’s work together to bring your packaging projects to life!

Sealester Tech - Sealester Sealing
To make production cost-effective, traditional welding methods (heat bars, impulse, ultrasound) typically require millions of packaging units. But what if you want to think outside the box? The First Step: Prototyping. Before creating specific tooling, it’s crucial to finalize the desired shape. Sealester has THE solution! With its innovative welding process based on digital welding technology, Sealester enables the creation of customized flexible packaging in mini and small series, with no additional tooling costs. How Does It Work? A mobile welding tool follows a trajectory defined by the operator, applying precise pressure to the films being welded. Want to change the shape? Nothing could be simpler: just update the tool’s movement program. This technology is integrated into a standalone machine designed specifically for producing prototypes. It allows designers and users to validate their concepts before launching mass production. What About Settings? Welding parameter adjustments are fully optimized thanks to a digital algorithm. It automatically calculates the ideal parameters for a perfect weld. The result? Reduced setup times, no longer reliant on the operator’s experience, but on precise, instantaneous scientific calculations. What About Eco-Friendly Films? No limits! Eco-friendly films, whether mono-material, recyclable, or compostable, are fully compatible with DigiShape technology. Just like traditional complex polymer films, these new materials can be welded with the same precision and efficiency. Sealester supports the transition to more sustainable packaging without compromising on quality or creativity.

Sealester TecH - DigiPlus
A technological brick to induce more flexibility into traditional shaping machines! DigiPlus is module including the digital welding technology developed by Sealester and can be integrated into flexible packaging production machines, in order to provide them with flexibility in the form of welding or cutting of the packaging, without the need specific tools. Indeed, on traditional machines (heating bars, impulse, ultrasonic), each sealing or cutting shape is equivalent to a specific tool. Therefore, to be profitable, a significant number of packaging must be carried out, thus increasing the minimum order quantity (MOQ). Thanks to DigiPlus, the MOQ of pouches with special seals can be reduced. It is then possible to produce a range of packages with a low MOQ (for example 5000) while being profitable.