Specialist in gasket extrusion, custom made seal supplier, elastomer part design

Our custom elastomer part design solutions

Our elastomer solutions

BORFLEX® has laboratory and R&D teams within its structure, both for blends and for the design of elastomer solutions, to provide a personalized response to our customers' needs.


R&D in elastomer and composite materials

Our group has a very strong R&D strategy, making it a leader in innovation. Our laboratory develops new solutions and innovative prototypes. 

The BORFLEX® group produces and simulates the production of materials in order to provide highly accurate tests and obtain results as close as possible to real-life applications.  

The evolution, improvement and monitoring of materials used in prototyping allow the group to simulate mass production conditions as closely as possible.

Our studies allow us to follow the evolution of the markets and to stay ahead of our competitors.

Study & design

Material study and feasibility of your elastomer project

Specialising in the production of customised elastomer and composite solutions

BORFLEX® designs and manufactures customized rubber, polyurethane and composite parts for a wide range of industries.

We study all your needs, our teams carry out material and feasibility studies for you. A global expertise is brought to your project and we realize a complete specification for the manufacturing. Our mastery of all elastomer and composite processes will guarantee you a global solution for small or medium series production


  • - Study and laboratory
  • - Selection and control
  • - Mixture formulation


  • - Design offices
  • - 3D Prototyping
  • - Testing and simulation
  • - Design and production of tools


  • - Global solution
  • - From single parts to small and medium-sized series 
  • - Assembly and control
  • - Specific packaging

Gasket extrusion & fiberglass profile pultrusion, GRP profile

BORFLEX® manufactures extruded water-, air- and noise-tight gaskets, from design to manufacture of parts of all sizes. We also offer halogen-free, flame-retardant or self-extinguishing elastomers, in compliance with the most stringent standards for fire behavior and smoke toxicity.

Elastomer part design

In addition to our catalog products, our dedicated engineering departments design and develop innovative elastomer and composite solutions. We are able to meet all your project needs and offer you all the innovations on the market.

Rubber part molding

BORFLEX® is at your disposal for the design and manufacture of molded parts in rubber and polyurethane by injection, compression or transfer, by the unit, in small, medium and large series of all elastomer parts in the following blends: Nitrile, neoprene*, EPT, fluorocarbon (viton)*, industrial and food-grade silicone, natural, Hypalon*, Butyl*, S.B.R., PU and LSR.

Elastomer formulation & mixing

For several years, BORFLEX® has developed, perfected and produced several thousand elastomer formulas to meet the requirements of its processing customers. BORFLEX® mixtures are present in many markets: automotive, trucks, buses, construction, armament, food processing, handling, watchmaking, printing, electricity, railways, agricultural equipment, etc.

Cutting and packaging of elastomer parts

BORFLEX® assists craftsmen and small businesses in the design of single parts and small series. We can provide you with real custom cutting solutions for your projects. Over the years, BORFLEX® has built up a wealth of experience in cutting a wide variety of materials. From single parts to small and medium series: plugs, stoppers, special seals, tires, rings, special belts, suction cups, membranes, etc.

Rubber and polyurethane cylinder lining

BORFLEX® has extensive experience in the relining of rubber and polyurethane cylinders, and excels in the production of technical cylinders and linings tailored to the specific requirements of each industry.

Would you like to know more about our solutions? Please contact us!



Elastomer materials

Over the years, BORFLEX® has developed, perfected and produced several thousand elastomer formulas to meet the requirements of its converting customers.

BORFLEX® mixtures can be found in many markets: automotive, trucks, buses, construction, armament, food processing, handling, watchmaking, printing, electricity, railway, agricultural equipment, etc.

BORFLEX®'s organization and its high-performance equipment enable it to deliver mixtures in quantities ranging from a few kilograms to large series. BORFLEX®'s extensive range of testing equipment and procedures guarantee a consistent mixture quality that meets the specifications of its customers. The BORFLEX® laboratory team is available to help its customers develop new mixtures.

The different presentation formats :

  • - Continuous belt for injection and extrusion,
  • - Calendered plates,
  • - Calendered rollers,
  • - Pellets.

Rubber mixes

BORFLEX® produces all types of rubber compounds according to the ISO 1629 standard.

  • - NR Natural rubber
  • - IR Synthetic polyisoprene
  • - SBR Styrene Butadiene Copolymer
  • - BR Polybutadiene
  • - EPM / EPDM Co- or terpolymer of ethylene and propylene
  • - IIR / BIIR / CIIR Isobutylene isoprene copolymer, chlorinated or brominated or butylated
  • - NBR Acrylonitrile or Nitrile Butadiene Copolymer
  • - CR Polychloroprene
  • - VMQ / FVMQ / PVMQ Silicone, phenylated or fluorinated
  • - FKM Fluorocarbon elastomer Viton® type
  • - CM / CPE Chlorinated polyethylene
  • - CSM Chlorosulphonated polyethylene
  • - ACM / AEM Polyacrylate
  • - EVA Ethylene vinyl acetate
  • - HNBR Butadiene copolymer
  • - XNBR Carboxylated acrylonitrile butadiene copolymer
  • - CO / ECO Polyepichlorohydrin
  • - AU / EU Polyurethane

Silicone blends

Silicone requires special processing, BORFLEX® has dedicated a specific environment to "silicone" mixtures that can be mixed.

BORFLEX® has developed BORSIL, a range of silicone elastomers for use in extreme temperature and chemical conditions (fluorinated silicones).

Different families of silicones can be distinguished:

  • - Standard temperature silicones with a continuous temperature range of -50°C to +200°C which can be increased to 250°C,
  • - High-tear silicones, these are stan- dard silicones with a high tear strength,
  • - high resilience silicones with low DRC (compression set),
  • - Low-temperature silicones with a continuous temperature resistance of -110°C to +200°C,
  • - THT (very high temperature) silicones with a continuous temperature resistance of -50°C to +300°C,
  • - electrically and thermally conductive silicones,
  • "smart" silicones of the photoluminescent type (three colors available) or thermochromic type (choice of temperature and the transition color, programmable three colors and three temperatures).

BORFLEX® silicones are found in in many markets. They can meet aeronautical specifications 50, 52, 53 and 54 for silicones, and 61 and 63 for fluorinated silicones.


Approved mixtures

As a creator of rubber solutions, the BORFLEX® group places innovation at the heart of its strategy. Constant regulatory monitoring enables us to develop our elastomer compounds to offer components that comply with current requirements:

  • - Food & pharmacopoeia: amended regulation (EC) No. 1935/2004 of October 27, 2004 and various European positive lists, decree of November 9, 1994 relating to rubber materials and objects in contact with foodstuffs, food products and beverages, decree of August 9, 2005 relating to plastic materials and objects in contact with foodstuffs, food products and beverages, EU directive 1935/2004, NF EN 1186 part 1,2,3, pharmacopoeia XIth edition (residual peroxide content), FDA 21CFR177.2600, USP class VI, etc.
  • - Drinking water: ACS, KTW W270, WRAS, etc.
  • - Rail: EN 45545, NF F16-101, DIN 5510, ASTM, SMP 800 C, BS 6853, IEC 60695-11-10 UL94,
  • - Aeronautics: NF L17-106, NF L17-107,
  • - Automotive & Land Transport: IMDS, UL, REACH,
  • - Other industrial sectors: REACH, ATEX directive n° 94/9/CE, EDF DPIH

On request, we can offer you specific studies to meet your specifications and associated standards.

fda / acs / en 45545 nf l17-106 / nf l17-107



LSR silicone mixtures


  • - Food 1935/2004
  • - Class VI USP European Pharmacopoeia
  • - FDA
  • - REACH 1907.2006 / Absence of BPA / Absence of Phthalates and Heavy Metals (Cadmium / Tin)
  • - Absence of nitrosamines and nitrosable products according to regulation 93/11/EEC
  • - In full compliance with the Silicon Decree of 25/11/92


  • - Resistance to successive sterilisations
  • - Continuously withstands 200 to 240°C
  • - Brilliance and transparency
  • - Hardness range from 20Sh to 80Sh
  • - Possibility of adding a coloured additive to Silicone LSR while maintaining the chemical inertness of the material.
  • - Very good UV stability
  • - Very Good Dielectric Insulator
  • - Non-fuel


  • - Reduced cycle time
  • - Elasticity and shape memory ( Compression set )
  • - Post-cooking for 4 hours at 200°C to eliminate volatile organic compounds
  • - Fully automated process with no rework
  • - Available in two components A and B of 20 kgs or 200 kgs


Home / Home Automation : 

  • - Cook's brushes
  • - Flat Rake
  • - Conservation boxes 
  • - Cake moulds / Pie dish
  • - Flat portions are a compartmentalized room for freezing.
  • - Preservation lid (opened can)
  • - Switch seal (Sound insulation)....


  • - O-Ring / Flat Seal
  • - Sealing elements
  • - Connectors...


In our BORFLEX® laboratory, we are able to carry out value analyses and resistance calculations. Our laboratory performs all the necessary tests for the studies of our customers' projects.

The BORFLEX® Group relies on highly qualified engineers and a state-of-the-art laboratory for the development of high value-added products.

We use state-of-the-art processes and simulation tools to test our solutions. We offer our customers the opportunity to analyze their own materials.

We pay close attention to all stages of product manufacturing, from design to completion. We put our experience and the expertise of our technicians to work for elastomers.

Standards and certifications

ISO 9001:2015

DEKRA Certification SAS hereby certifies that the company

Certifiedcertified activity(ies) :

Design, formulation, production, marketing of mixtures, semi-finished products and products, particularly in elastomer, composite and metal. Trade in elastomer, composite, metal and related products.

Our DEKRA certified sites are : Cherbourg, Composites, Corvol, Hermes, Lille, Rubber, Services.


IRIS certification - ISO/TS 22163 - Railway industry

The International Railway Industry Standard (IRIS), introduced in 2006, was developed by UNIFE (the Union of European Railway Industries) with the help of major players in the railway industry (the railway equipment manufacturers Alstom Transport, Bombardier Transportation, Siemens Transportation Systems and AnsaldoBreda).

Our REX site is IRIS certified.

Processes and monitoring



  • - Rubber and silicone mixtures 
  • - Moulding (compression, injection, transfer)          
  • - Packing of rollers and rollers
  • - Complete solution
  • - Water jet cutting
  • - Coating of parts and rubberizing
  • - Profile extrusion (autoclave, UHF, salt bath)
  • - PU processing (casting, ribbon flow, rotomoulding)
  • - Pultrusion
  • - SMC/BMC/RTM/LSR (liquid silicone rubber) moulding
  • - Machining and finishing

Would you like to know more about our solutions? Please contact us!


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