FIBRAFLEX®, la fibre métallique amorphe

FIBRAFLEX Saint-Gobain

Composed of a predominantly iron-chromium alloy that undergoes hyper-quenching during manufacture, this highly advanced technology gives these fibers exceptional properties. Easy and quick to use, FIBRAFLEX® gives concrete a better resistance and prevents the propagation of micro-cracks.



For concrete optimised mechanical properties

  • Improvement of the characteristics and durability of concrete
  • Increased concrete strength at the first crack openings


For concrete dense and homogeneous reinforcement

  • For a dense and homogeneous reinforcement of your concrete
  • Very high specific surface = Very high bond to the concrete matrix


For concrete easier handling and greater safety

  • Easier process (mixing, pumping or spraying)
  • Lower risk of injury


For concrete greater sustainability

  • Corrosion resistance and durability
  • Compatibility in contact with drinking water
Fibre at scale
Fibres à l'échelle


FIBRAFLEX in figures
Product code FF30L6 FF20L6 FF20E0 FF15E0 FF10E0 FF5E0
Length (mm) 30 20 20 15 10 5
Width (mm) 1.6 1.6 1 1 1 1
Thickness (µm) 29 29 24 24 24 24
Equivalent diameter (mm) 0.25 0.25 0.18 0.18 0.18 0.18
Length / Diameter ratio 120 80 111 83 56 28
Number of fibres/kg 100 000 150 000 275 000 385 000 580 000 1 100 000
Specific surface(m²/Kg) 10 10 10 10 10 10
Density 7.2 7.2 7.2 7.2 7.2 7.2
Actions within concrete

The mechanical performance of a fibre-reinforced concrete depends on the anchoring mechanism for each fibre and the number of fibres 'stitching' the cracked section.

FIBRAFLEX is fine and highly adhesive so that it does not slip (thanks to its very large specific surface in contact with the cement matrix). This means the fibres are put under tension as soon as force is applied to the concrete and firmly hold the crack from opening. The crack only appears when the force applies exceeds the fibre breaking force (=1 400 MPa minimum guaranteed for each fibre).

FIBRAFLEX's excellent traction resistance and its very good adhesion to the matrix allows an improvement in the bending resistance and durability of reinforced concrete (prevents aggressive agents penetrating inside the matrix).



Consultancy and partnerships

Our expertise in the field of fibre-reinforced concrete, our own research and development work and partnerships with various university research centres (in France and abroad), private laboratories and/or specialist research facilities allow us to advise you on your use of FIBRAFLEX (reference specifications and measurements, modelling, etc.) :

Saint-Gobain SEVA is a member of various unions and/or professional associations in the areas where the use of FIBRAFLEX proves particularly worthwhile: