BORFLEX® is the French and European leader in technical rubber parts and is a creator and producer of elastomer solutions for the main players in the nuclear energy industry.
BORFLEX® is the supplier of choice for major contractors and all those involved in new construction and maintenance.
BORFLEX® manufactures, in particular for the nuclear energy industry, mechanical parts and precision assemblies in all types of metals and alloys, and also in many types of plastics (such as PVC, polypropylene, polyethylene, polyamide, etc.).
TheBORFLEX® Group designs and manufactures all types of rubber and PU molds, as well as rolled gaskets, and can supply custom-made elastomer seals and parts for the nuclear industry upon request.
BORFLEX® expertise
BORFLEX® stands out thanks to its expertise, mainly in the following areas
- Radiation resistant elastomers
Which guarantee the watertightness of the working chamber
· Seals for swimming pools (cofferdam seals)
· Radiation protection (Flexibore)
· Sensitive sealing applications
· Protective bellows
The FLEXIBORE® brand, registered by BORFLEX® and specially developed for the nuclear energy industry, guarantees that the final part will absorb thermal neutrons.
Its 50% B4C composition makes scattering negligible compared to neutron absorption. FLEXIBORE® is also used in neutron spectrometry to reduce background noise.
FLEXIBORE® is very flexible and can be adapted to complex shapes. It can be folded on a small radius without breaking. It is easy to cut and the B4C powder is evenly distributed.
Flexibore is a material composed of natural rubber and B4C powder. The Flexibore sheet contains 50% of its weight in B4C. The B10 contained in the material absorbs neutrons. Scattering is negligible compared with neutron absorption. Flexibore is also used in neutron spectrometry to reduce background.
CHARACTERISTICS:
- - High flexibility: adapts to complex shapes
- - Folds to a small radius without breaking
- - Uniform distribution of B4C powder
- - Easy to cut
- - Black colour

We are proud to announce that our group has obtained ISO 19443 certification, an international standard dedicated to suppliers in the nuclear industry.
This recognition confirms the quality, safety, and rigor of our management systems, as well as the commitment of all our teams. This milestone allows us to go even further in operational excellence and strengthen the trust of our customers, partners, and clients in this strategic market.
View the certificate here
Examples of watertight elastomer products for the nuclear industry
- - Rolled fillets
- - Custom joints
- - Door seals (between reactor and living area)
- - Moulds cc or pu
- - Wear parts for valves
- - Mechanical parts (for metals, alloys, plastics)