Tuffdrain® has been designed for excellent drainage and durability. It's an asphalt material developed for use in Sustainable Urban Drainage Systems (SUDS)

The solution works in line with current planning requirements by managing rainfall  for a wide range of applications including porous or ground water storage technology.

Tuffdrain® helps to prevent localised flooding following periods of prolonged heavy rainfall and with its unique design, using a premium Polymer Modified Binder (PMB),  it provides a durable# free-draining solution that out-performs traditional open textured AC materials. Tuffdrain delivers drainage significantly in excess of that required for SUDS systems. It also has improved durability through the thick PMB binder film.


When laid in accordance with BS 594987, the aggregate matrix is locked together and further held by the excellent adhesive properties of the PMB. Installers should be experienced in the use of SUDS solutions with attention given to the foundation,
drainage characteristics and traffic loading.

For increased stiffness where a degree of fuel resistance may be required.

Tuffdrain® HD
For higher stress areas where the drainage is required in line with highest levels of performance.



  • Excellent drainage
  • Enhanced durability
  • Quicker installation
  • Increased stiffness

Please note: lead in time may be required for specialist bitumen.



  • SUDS applications

  • Sport surfaces


Tuffdrain technical data

Coarse aggregate
Los Angeles abrasion value 30 max
Aggregate abrasion value 15 max
Flakiness index 20 max (30 max for 6mm only)
Nominal sizes 6mm; 10mm; 14mm,  20mm
Binder High performance Polymer Modified Binder (PMB)

Road and laboratory test results

Material property Test specification Typical result
Design void content BS EN 12697-6 ≥ Vmin 14.0%
Binder drainage BS EN 12697-18 Beaker Method < 0.3%
Water sensitivity BS EN 12697-12 Method A (ITSR) BS EN 12697-23 ≥ 80%
Indirect tensile stiffness modulus BS EN 12697-26 Annex C > 3,000 MPa
RTPD (wheel tracking) BS EN 12697-22 Procedure B WTS in Air ≤ 1.0mm/103
Hydraulic conductivity BS DD 229 > 15,000mm/hr (10mm)
> 20,000mm/hr (20mm)


 Tuffdrain® offers enhanced durability when compared to traditional open textured asphalts. However, before placing an order please review the site compatibility with your local Sales/Technical team.

For more information on our SUDS range of aggregates (Aggflow) used within the Tuffdrain® mix, please contact the aggregates technical team at aggregates@uk.heidelbergmaterials.com