Preservation Treatment Applications
There’s not a one size fits all approach to pavement management. According the National Center for Pavement Preservation, the key to effectively extending the life of asphalt is doing the right treatment, at the right time, on the right surface. Below are links to more information, including the pros and cons of each treatment.

GREATEST COST SAVINGS: Request an assessment specific to your location to determine which treatment(s) offer the best value for your needs.


HA5 (High Density Mineral Bond)

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Summary: HA5 is comprised of a mixture of fine aggregates combined with a proprietary and uniquely stable base emulsion that includes materials to resist UV damage.

Pros: Reduces cracking and raveling by effectively preserving the existing asphalt binder. Effectively deflects UV rays. Backed by a five year guarantee. Excellent durability and life extension. Reduces aging by restoring oils and resins to the surface. High aesthetic appeal with a pleasing “surface friendly” finish that is very well accepted by the public. Learn more.

Cons: Limited effectiveness on heavy load, high volume, high speed roadways. Will not mask moderate to major defects in a distressed pavement.


Slurry (Types I, II, and III)

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Summary: Slurry is most effective on moderately distressed roadways or parking lots requiring moderate rehabilitation.

Pros: Good durability and life extension. Is perceived as the best low-cost rehabilitation treatment for roads in moderately poor condition. Offers good skid resistance. Can be used on heavy load, high volume, high speed roadways. Good at covering minor surface imperfections.

Cons: The abrasive texture is not generally recognized as “Surface Friendly” for residential areas although it is commonly used in residential when pavement is in poor, distressed condition. The abrasive texture and the “roll out” of small aggregate particles make it less desirable. Residue after installation easily tracked into homes and businesses for weeks after installation. A slurry surface is only a protectant layer on top of the existing surface, and does not form a permanent bond with the underlying pavement. A slurry will oxidize quickly and lose its black color within the first several months.


Seal Coat

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Summary: A seal coat is a thin liquid application which consists of a slow-setting asphalt chemical emulsion mixed with fillers, water, and a variety of other additives.

Pros:They provide high aesthetic value and provide a temporary sealant to the top of the asphalt to help prevent water from penetrating the surface.

Cons: Lack of durability resulting in a very limited life span. Does not hold up to exposure to sunlight and water over time. Lack of effective industry standards promotes unreliable quality. Will not mask moderate to major defects in a distressed pavement. Becomes very costly due to the frequency of application required for preservation benefits.


Cape Seal (Chip Seal with Slurry)

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Summary: A Cape Seal is a multiple surface treatment that consists of the application of an asphalt emulsion chip seal followed by the application of asphalt emulsion slurry seal. A chip seal is applied to the road with the excess aggregate removed after the asphalt has cured. A slurry is then applied over the chip seal treatment.

Pros:The slurry bonds the chips to prevent loss and the chips prevent undue traffic abrasion and erosion of the slurry. The cape seal increases the life of a chip seal by enhancing binding of the chips and by protecting the surface. Provide a highly durable surface treatment. The cape-seal surface does not have the abundance of loose chips resulting from a chip seal while creating a dense mat.

Cons: The abrasive texture is not generally recognized as “Surface Friendly” for residential areas although it is commonly used in residential when pavement is in poor, distressed condition. The abrasive texture and the “roll out” of small aggregate particles make it less desirable in residential areas. Residue after installation is easily tracked into homes and businesses for weeks after installation. A slurry surface is only a protectant layer on top of the existing surface, and does not form a permanent bond with the underlying pavement. A slurry will oxidize quickly and lose its black color within the first several months.


Fog Seal

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Summary: A fog seal is an asphalt emulsion spray applied that is most appropriate as a short-term assistance to a dry pavement or as a temporary binder on top of a chip seal treatment to help alleviate chip segregation.

Pros: Fog seals are inexpensive compared to other surface treatments. Only a distributor truck is required to apply the fog seal in most cases.

Cons: If applied too heavily, the fog seal could be slippery and hazardous for the road users. The expected life of the fog seal is far shorter than other surface treatments.


Chip Seal

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Summary: A chip seal consists of a layer of asphalt emuslsion that is overlaid by a layer of aggregate. Chip seal is a cost effective treatment for high traffic roadways. Not suitable for low volume roads and parking lots.

Pros: Good durability and life extension for high volume, heavy load, and high speed roadways. Very good skid resistance. Good for sealing small to moderate surface cracks.

Cons: Abrasive texture is not “Surface Friendly” for residential areas. Not effective for low volume roadways and parking lots. Lack of continuous traffic keeps the surface from binding together to form a suitable surface.




Holbrook Asphalt Co.  |  3828 S. 1700 E. St. George, UT 84790  |  Utah: 435.652.4427  |  Nevada: 702.823.3902  |  Arizona: 602.307.0425  |  holbrookinfo@holbrookasphalt.com