The Tested and Proven Reliable Choice for Preserving Our Roadways

The Most Cost-Effective Pavement Preservation Strategy

High Public Approval


Performance Backed by Seven Year Study

Trusted by Hundreds of Public Works Departments


No Loose Aggregate or Grainy Residue on the Surface Post Installation

Lower Cost of Pavement Ownership

Significantly Extends Pavement Life

Experts in Pavement 

International Pavement Management Association

Join the Executive Director of International Pavement Management Association as he takes a group of engineers on a tour of HA5 installations. 

Renowned Pavement Expert, Tom Scullion, P.E.

With a 40 year career at TTI, Tom Scullion is responsible for numerous pavement-related inventions, designs, procedures, and software innovations that have enhanced the safety and performance of roadways. His innovations have saved lives and taxpayer dollars by extending pavement life and improving maintenance procedures for roadways around the world.

Robert Rothwell, P.h.D - CAI Board of Trustees

Robert Rothwell, PhD, President of the Village Green HOA, has won numerous awards such as the Outstanding HOA of the Year, Board Member of the Year, and is currently on the board of trustees for Community Associate Institute (CAI) educating HOA board members to better serve their communities.

Hear the Truth About Pavement Preservation from Over 20 HA5 Customers

Engineered to Preserve

HA5 was developed to meet the demand for effective asphalt preservation on residential roadways without the negative side effects of chip seals or slurry seals. Specifically engineered to preserve the native asphalt binder, HA5 is exceptional at preventing oxidative damage. As a result, you will have streets that last longer and cost less to own.

What is HA5

HA5 is arguably the fastest-growing trend in pavement preservation, now in use by over 200 public agencies. Meeting the stringent demands of a High Density Mineral Bond, HA5 is uniquely emulsified with a near neutral charge that is able to hold a unique blend of fine aggregates. Limiting oxidative damage from moisture is fundamental to HA5’s preservation qualities. But just as critical to the prevention of oxidative damage from moisture is preventing oxidative damage from Ultraviolet (UV) radiation. HA5 combats oxidation from UV by including limited amounts of specific polymers to reflect damaging UV rays.

HA5 features include:

  • A specialized, non-ionic emulsion specifically engineered to carry mineral types that are not compatible with anionic and cationic emulsions.
  • A blend of ultra-dense, angular-shaped fine aggregates formerly unavailable in a thin surface treatment.
  • A combination of specific polymers that combat oxidation by deflecting Ultra-Violet Rays.

The former head of pavement materials at the country’s largest state DOT, published research findings that identified pavements with HA5 High Density Mineral Bond installed had a 67% delay in the age-hardening of the asphalt. Keeping asphalt flexible prolongs the useful life of the pavement and reduces cracking resulting from pavements becoming brittle.



“Using conventional as well as leading-edge testing methods to identify the age hardening of the asphalt binders, researchers have identified a 67% delay in the age hardening of the asphalt binder with HA5 installed as a pavement preservation strategy. This ability to reduce flexibility loss supports an in-field case study where after just a four-year period a side-by-side comparison identified cracking to be reduced by nearly 9 times with HA5 installed.”

Dr. Shakir Shatnawi, P.h.D., P.E. "Transportation Research 2020"

Former State Pavement Engineer & Division Chief at Caltrans with 30 years of experience in pavement design, management, and preservation

Tested, Proven Performance

An evaluation was completed comparing HA5’s performance in a side-by-side comparison with another treatment. On one section, a commercially available polymer-enhanced asphalt emulsion was installed within a week of an adjoining HA5 installation.

The original paving of both sections was done as one project nine years before the side-by-side maintenance treatments were installed.

Each of the treated sections had multiple crack samples taken. The HA5 treated section had sample areas examined that calculated to an average .007 of the surface experiencing cracking and the polymer enhanced asphalt emulsion sampled road surface was found to have .06 of the area with cracking. That’s an astounding 857% more cracking in the non-HA5 treated pavement compared to the road having had HA5 installed.

Owners and managers responsible for asphalt roads and parking surfaces realize significant reduction in pavement lifecycle costs with HA5 due to the asset preservation qualities and durability of the installations. In use by public agencies nationwide, it is also the choice for school districts, religious organizations, medical providers, and various business types for asset preservation.

Research on binder elasticity and pavement permeability proves that asphalt treated with HA5 significantly increases the useful life of asphalt pavement and therefore lowers the cost of transportation infrastructure.

HA5 Return on Investment

See the full results of the Return On Investment (ROI) Study Conducted by an independent infrastructure asset and pavement management. You will discover how the achieve the:

  • Highest Return on Investment (ROI)
  • Highest Pavement Condition Index (PCI)
  • Highest Public Acceptance Rating (PAR)

There is no one-size-fits-all tool in the preservation toolbox, but for subdivision roadways, HA5 provides the highest benefit per dollar spent.

Public agencies, school districts and private communities across the country rely on us for asset preservation, including:

Helpful Resources

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South Carolina