Fibredec Surface Dressing

Versatile Application, Proven Performance

Fibredec surface dressing is an effective solution to problems above and below the road surface.

It is a unique combination of bitumen emulsion, chopped glass fibre and aggregate. Together these form a strong, flexible and waterproof matrix which has a variety of uses both above and below the road surface.

Hidden strength

Visible benefits

Decorative surface dressing

Stress Absorbing Membrane Interlayer (SAMI)

Fibredec Surface Dressing

Fibredec can be applied to a variety of thicknesses as a single coat, double coat or racked-in dressing. Fibredec can be laid to a variety of thicknesses to suit a wide range of uses including roads, car parks, waterways, parks and heritage sites.


Stress Absorbing Membrane Interlayer

Fibredec SAMI - crack inhibiting membrane - effectively inhibits reflective cracking over a whole range of applications including roads, footpaths, car parks, commercial and architectural developments.


Fibredec Decorative Surfacing

Fibredec decorative surfacing design brings together a combination of materials, carefully selected to harmonise with their surroundings and designed to meet the requirements of different site conditions and usage patterns. Comes in a variety of natural colour aggregates.

Versatile – What it is for

Fibredec is particularly effective when used:

  • to provide a waterproof and flexible membrane on cracked and crazed surfaces

  • to restore skid resistance to spalling or fretting concrete and blacktop

  • to provide a cost effective surface over unbound, granular sub bases

  • to inhibit reflective cracking when used above or below the road surface as a Stress Absorbing Membrane

Proven performance

Whilst conventional SAMIs simply relieve stress, Fibredec acts like a cushion - its thickness absorbs stresses, thereby acting as a true stress absorbing membrane.

Research undertaken by Nottingham University concluded that: Fibredec has sufficient tensile strength and flexibility to absorb movements in the pavement structure and prevent the surface from cracking. Where permanent lateral movement of the overlay might occur – due to cracks in the underlay material – Fibredec reduces the magnitude of the resultant strain in the overlay by spreading it over a greater area.


Ulster University confirmed the Nottingham results, while Australian evaluation studies have endorsed the system’s performance in live situations. The use of Fibredec as a SAMI significantly inhibits the propagation of reflective cracking in an asphalt overlay. In each of the tests conducted, the samples using Fibredec out-performed the samples where no SAMI was used.

The use of Fibredec was shown to enhance the performance of an overlay by approximately 30% (fatigue and tensile stress) and wheel tracking tests by 300%. The benefits and ease of application of the sprayed in-situ Fibredec membrane were also noted and compared favourably with the associated difficulties of laying a conventional woven geotextile.

Where to use

  • can be applied by hand in difficult and hard to reach areas
  • over asphalt or concrete
  • on consolidated Type1 materials and unbound, granular road bases
  • for environmentally sensitive sites, or areas requiring some form of colour demarcation
  • in areas with difficult or restricted access


Specially developed application equipment capable of both high output and delicate control applies glass fibres in-situ, sandwiching them between two layers of polymer modified bitumen. Selected aggregates are then rolled into the surface leaving a crack and fatigue resistant surfacing characterised by enhanced tensile strength. The system can be applied as a single coat, double coat or racked-in dressing depending on the needs of the site.

A wide range of different coloured aggregates are available.