Dejoie Foundry: nearly 100 years of expertise in aluminium and security
Fonderie Dejoie: nearly 100 years of expertise in aluminium and security
We have been proudly based in Nantes since 1929. As a small team of around ten people within a group of 70 employees with our parent company Lemer, we cultivate industrial expertise that has been passed down for nearly a century. Every day, we evolve our practices to meet the challenges of innovation, performance and sustainable development.
Today, our company designs, manufactures and distributes a comprehensive range of products designed for demanding customers in France and abroad:
- Metal and plastic security seals to guarantee traceability, control and protection
- Aluminium alloy parts, from raw materials to the assembly of sub-assemblies
- The famous yellow post boxes of La Poste, which we have been manufacturing since 1949
From Lead Processing to Mastery of Aluminium
Everything began in 1929, with the creation of Dejoie, a company specialized in lead processing and the manufacturing of lead seals.
But in 1945, due to material shortages following the Second World War, the company took a strategic turn: it shifted towards aluminium, a lighter, more modern alloy better suited to new industrial needs.
In 1949, Dejoie wins a landmark tender from the PTT (now La Poste), becoming the exclusive manufacturer of French mailboxes. A long-term partnership was born.
A Subsidiary of the LEMER Group Since 1988
In 1988, Dejoie joined the LEMER Group, a specialist in the casting of lead and low melting point alloys. This integration strengthened our industrial capabilities while allowing us to diversify our markets.
At the same time, we developed a range of innovative security seals, both metallic and plastic, to meet the growing demands of sectors such as transport, logistics, industry, energy, and public institutions.
Today, Dejoie is recognized as one of the French leaders in the design of security, control, and traceability solutions.
Some key dates in our history
Our Core Values
Trust
We place trust at the heart of all our relationships — with our employees, clients, subcontractors, and partners. It is the foundation of long-term, transparent collaboration.
Collaboration
Working together, getting involved collectively, being hands-on — every team member contributes actively to our projects, with commitment and enthusiasm.
Agile Expertise
For nearly a century, we have nurtured strong industrial expertise while remaining agile in the face of technological, environmental, and economic changes. At Dejoie, operational agility is second nature.