Duralayer Multi ® / Duralayer Multi ®+

Duralayer Multi® is a close textured, single layer application which is suited to a variety of asphalt surfacing applications where a low textured and deformation resistant one layer treatment is required.

It was designed following a request from a Local Authority for a cost-effective,  single layer solution. It utilises locally-sourced aggregates and for a variety of applications including major roads, rural roads, housing estates, car, caravan parks and trench reinstatements. Duralayer Multi® can be used for a variety of applications. The material has a low surface texture and low air voids, which results in material that doesn’t segregate like traditional materials, therefore protecting lower layers from water ingress. 

Duralayer Multi® is available in 20mm, 14mm, 10mm and 6mm sizes and is laid using conventional paving equipment in line with BS 594987.

Duralayer Multi®+
As per Duralayer Multi® but also provides enhanced fuel resistance.

Layer thickness
Details of constituent quality and layer thickness shown below:

  • 6mm nominal size 30 – 60mm
  • 10mm nominal size 40 – 80mm
  • 14mm nominal size 50 – 100mm
  • 20mm nominal size 60 – 150mm


The main advantages of Duralayer Multi® when used as a maintenance treatment, either as inlay or overlay or as a surface course for new construction, are:

  • Dense asphalt concrete grading, low voids
  • Prevents water ingress
  • Dense grading enhances fatigue resistance
  • Resistance to deformation
  • Sustainable product
  • Our Duralayer Multi®+ mix has fuel resisting properties
  • Low design void contents assists compliance with SROH requirements


  • All classifications of roads
  • Housing estates
  • Car and Caravan parks
  • Footpaths
  • Trenches

Duralayer Multi technical data

Coarse aggregate
Los Angeles abrasion value 30 max
Aggregate abrasion value 12 max
Flakiness index 20 max (6mm 30max)
Nominal sizes 20mm; 14mm; 10mm; 6mm
Binder 40/60 pen  70/100 pen 100/150 pen
Layer thickness
30mm to 150mm

Typical performance figures

Material property Test specification Typical result
Design void content BS EN 12697-6 ≤ Vmax 5.0%
Water sensitivity BS EN 12697-12 Method A (ITSR) BS EN 12697-23 ≥ 80%
RTPD (wheel tracking) BS EN 12697-22 Procedure B WTS in Air ≤ 1.0mm/103


*Typical value for surface texture.  Please contact the asphalt technical team at asphalt@uk.heidelbergmaterials.com for further information.


Rural road improvements

Rural road improvements