Asphalt Preservation

Asphalt Preservation Contractors

Growing in demand, asphalt preservation is a very sustainable and cost-effective process, where the service life of a road or footway surface course can be significantly extended. 

Working with ASI Solutions’ RHiNOPHALT asphalt preservation treatment is extremely effective for increasing the service life of all types of road and footway surfaces, where our specialist, bespoke plant is used to apply RHiNOPHALT.

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RHiNOPHALT is an investment not a cost. It produces outcomes-extending the life of the surfaces of asphalt infrastructure as well as reducing costs and maintaining condition.

By preserving the asphalt surface with Rhinophalt and protecting the pavement, making it last longer, is one of the most sustainable asphalt maintenance systems available. Extending the life of the surface course by up to 100% reduces the number of times you need to resurface as well as reduce reactive maintenance. Sustainability through preservation conserves the valuable mineral resources and fossil fuel binders.

Benefits include:

  • Slows the oxidisation and deterioration of the carriageway or footway surface.
  • Significant reduction in carbon footprint (over 90%).
  • Significant reduction in disruption to road users (up to 40,000 sq.m. per shift, with night time application and road-marking reinstated in the same shift).
  • Reduces the demand for reactive maintenance, with fewer potholes and less insurance claims.
  • Does not prevent other treatments from being used in the pavement life cycle, as it just keeps green and light amber roads in good condition for longer.
  • Any asphalt surface in a reasonable condition, typically 1-2 years from needing reactive maintenance, can be treated, then retreated again after 5 and 10 years to extend the life of the surface by up to 15 years.
  • No need to adjust ironworks.


protects, and significantly extends the service life of the asphalt infrastructure

Environmental savings

– more than 90% carbon reduction compared to traditional resurfacing

Minimise disruption

to the travelling public by applying during night closures


certification and CE Mark – meeting the requirements of Clause 950 in the Specification for Highway Works

Our Asphalt Preservation Services

Asphalt preservation is sustainable, low-carbon and cost-effective, allowing highways managers, private businesses, and airport planners to pre-empt degradation extending the life cycle of carriageways, paths and runways many times over.

Henry Williams & Son has a long track record of exceptional quality asphalt preservation projects, improving the durability of important road infrastructure, mitigating the risk of congestion, pollution and delays due to poor condition surfacing, and saving local governments, highways agencies and commercial organisations unnecessary spending. 

We work quickly and efficiently, using our preferred Rhinophalt® treatment and our skilled roadway engineers and project planning teams to minimise disruption, maximise speed and schedule your work at the most convenient time.

Treating asphalt with a preservative is an investment in future performance. It can be applied to in-service roadways, significantly reducing the risk of accidents or damage caused by uneven surfacing, extending the longevity of roads, and mitigating the potential need to invest in reactive maintenance

The Benefits of Professional Asphalt Preservation

There are two primary advantages to asphalt preservation – sustainability and cost-effectiveness. Asphalt preservation treatments can also be applied more than once where extensive usage or a prevalence of HGVs or other heavy-duty traffic puts additional pressure on asphalt surfacing.

Other benefits include:

  • High-speed applications, with damage prevention an optimal way to enhance the condition, appearance, and performance of surfacing systems.
  • Sustainability, avoiding any need to replace otherwise suitable roadway surfaces due to developing wear and tear.
  • Improved quality performance where carriageways or surfacing is subject to quality standards or testing – most relevant to the aviation industry.
  • Reduced costs in upkeep, with reactive maintenance to address deterioration, potholes, cracks, and gaps considerably more expensive than a preservative treatment.
  • Long-term protection – our skilled surfacing engineers apply Rhinophalt® in one pass, using a combined sprayer for precision application. Treatments dry within two hours, with the option to re-line asphalt during the same project but provide ongoing protection for years to come.

Why Choose Henry Williams & Son?

As one of the longest-established highway maintenance contractors in the UK, Henry Williams & Son works with a variety of clients, organisations, and public sector bodies, providing expertise, guidance, project planning and cost-effectiveness.

We are an end-to-end contractor, avoiding the need to subcontract to third parties or devolve one project into multiple subsections, increasing time, cost, and supervision.

Our company has remained family-owned for over five generations. While we have grown substantially in that time, we remain committed to our guiding principles of quality, service, and support, often working with repeat clients as a trusted provider of the highest surfacing standards. 

civil engineering

Related Services

As a full-service highway maintenance contractor and civil engineering specialist, Henry Williams & Co can combine services or adapt to different project scopes, whether you need to preserve long stretches of asphalt in a phased treatment schedule or arrange ad hoc support to improve the performance of newly laid road systems.

Related services that can be linked with asphalt preservation for convenience and efficiency include:

  • Asphalt Surfacing: we use several pavers depending on the nature of your project, with both machine-laid and hand-laid asphalt surfacing available, alongside other surfacing solutions such as resin.
  • Surface Dressing: specialised surface dressing can enhance user safety or improve the aesthetics of a roadway, with options such as skid resistance and polymer-modified binders for infallible strength and durability.
  • Carriageway Re-Treading: our sustainable re-treading service re-profiles existing aggregate in carriageways or roadway infrastructure, effectively recycling aggregate and adding bitumen emulsion for an environmentally friendly resurfacing solution.

Frequently Asked Questions

What Is Asphalt Preservation Used for?

While asphalt preservation is important for roadways, it can also be used for pedestrian pavements, private routes, commercial premises, loading bays, industrial parks and any other location with a paved road or walkway.

Why Rhinophalt®? 

This asphalt preservation treatment improves the resistance of surfacing to wear and strengthens the adhesion between the binder and aggregate. The naturally occurring bitumen also extends the durability of asphalt by minimising oxidisation.

This unique product has been used to treat more than 20 million square metres of asphalt and is HAPAS certified, following a trial period over two years on the M40, tested to the most rigorous standards on this exceptionally busy motorway.

How Cost-Effective Is Asphalt Preservation Compared to Resurfacing?

Exact statistics vary depending on the size, usage, and nature of the roadway, but Rhinophalt® asphalt preservation has been shown to reduce maintenance costs over the lifetime of an asphalt surface by 30% – and costs less than reactive maintenance should you need to repair potholes. 

Over the life of an asphalt surface, preservative treatments further reduce interventions and emergency repairs by at least 40%.

Is Asphalt Preservation Harmful to the Environment?

Asphalt treatments provide a 94% reduction in carbon emissions compared to conventional resurfacing and are an environmentally friendly option, saving on raw materials, transport, and fuels.

How Long Does it Take to Apply an Asphalt Preservation Treatment?

The treatment curing times will adjust with different projects. However, it is possible to cover larger carriageways or longer sections of the highway, with each shift treating up to 30,000 square metres.

Asphalt preservation treatments require from 30 minutes to two hours to dry, in typical conditions, although this may depend on the weather and the existing state of the surface. As an indication, a combined sprayer travels roughly five miles per hour.

What Is the Best Way to Preserve Asphalt Surfacing With Minimal Disruption?

Our goal is always to provide exceptional service, and our consultants can advise on the possibilities, such as scheduling treatment works overnight or around other highway surfacing works. For example, a section of road that is closed for resurfacing can be extended by one to two days to allow for treatment, reducing the potential for further disruption in the future.

We normally deploy one machine to carry out the work quickly and efficiently during road closures without needing heavy equipment or compaction vehicles.

Browse the Henry Williams & Son project gallery here