New industry guidance for asphalt preservation

A new industry guidance note from the Road Surface Treatments Association (RSTA) and ADEPT provides best practice guidance and technical information for the application of asphalt surface course preservation treatments.

Asphalt preservation involves the spray application of a sealant treatment onto bituminous-bound road surfaces that consequently restricts water ingress and inhibits binder oxidation. By providing a protective seal, the treatment can significantly extend the resilience and performance life of an asphalt road surface. The technique can be used as part of an asset management strategy designed to maintain network condition by keeping green roads in green condition for longer delaying the need for reactive maintenance. Specified in clause 950 in the Specification for Highway Works, asphalt preservation is an effective and cost-efficient road surface treatment that has been used in the UK since the 1990’s.

The new guide outlines the process of asphalt preservation and highlights the responsibilities of client, contractor and installer concerning planning and co-ordination, health and safety, environment and work execution. Reference is made to the relevant regulations, standards and training qualifications.

Welcoming the new guidance, Rory O’Connor, RSTA Interim Chief Executive, said: “The new guidance note provides information on the right way to apply asphalt preservation treatments and gives practical advice to both client and contractor. Its use will ensure best industry practice that will result in the successful application of asphalt preservatives.”

The RSTA /ADEPT Guidance on Asphalt Surface Course Preservation Treatments is available as free download at:


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