Through the richness of its symbiotic ecosystem, ALTHEORA deploys strong industrial synergy by combining business lines and know-how that support always providing the best and most wide-ranging solution to meet the expectations of its clients.

Within these expertise divisions, specialist companies develop on their markets. The ALTHEORA Composites division hosts technological know-how and cultivates innovation in composite material applications. It has equipment that is as precise as it is powerful. Its experts develop processes that allow it to support projects from their creation to their end use, whatever the technical constraints, and as such ensuring client satisfaction.

Today ALTHEORA COMPOSITES supports the processing of composite materials in numerous domains, split into four sectors:


Our technical sophistication helps us produce parts that respect advanced engineering characteristics, from shielding to lightness and non-corrosiveness, parts with a painted appearance, as well as integrating functions and controllers.


We work with the market leaders to supply railway equipment and embedded equipment that meets strict qualifications in terms of fire, smoke, mechanical and dielectric properties, wear, impermeability, insulation, signaling, etc.


Using our compression presses that can exert a force of up to 2,000 metric tons, we produce aerodynamic parts, car body parts, interior structural/semi-structural parts (floorboard, hood, engine compartment bulkhead, etc.) in significant volume, even offering a reliable alternative to steel or aluminum.

Sports, Recreation,
Marine & Medical

We develop products that meet more specific requirements, such as sporting equipment, medical equipment (sterilization stations, sanitary facilities, etc.), recreation and marine equipment (pool walls, marine furniture, etc.).

MECELEC Composites Nested by Altheora

Within ALTHEORA Composites, MECELEC Composites is the company providing expertise, and is a leader in processing composite materials. For more than 80 years, it has put its know-how at the service of its clients.

Today, with more than 6,000 product references and 500 clients in 28 countries, MECELEC Composites is the expert partner in consulting and engineering, supporting projects from proof-of-concept to production.

MECELEC Composites has an excellent command of all its manufacturing processes, thermoplastic injection, thermosetting, sheet molding compound (SMC), contact, resin transfer molding (RTM) and infusion. It processes all existing materials, and produces technically sophisticated parts (of non-standard sizes, resistant to extreme temperatures, fireproof, with strong electrical insulation properties, etc.). It also offers finishing work for parts up to the end product (painting, marking, insertion, cabling, surface treatments, etc.)

Today, with its four manufacturing sites (Mauves, and St-Agrève (Ardèche, France), St-Etienne-de-Saint-Geoirs (Isère, France) and Cluj-Napoca (Romania)), MECELEC Composites is in a position to propose clients one-off or mass-produced parts that meet complex technical specifications and strict standards, whether it be in terms of resistance, flexibility, or impermeability, for example.

The ALTHEORA COATING division is the expert in painting and industrial coatings. It can improve the quality of end-use parts, whatever their application.

Go to website: MECELEC COMPOSITES Nested by Altheora