What is slurry surfacing?

Slurry surfacing is a thin, cold mixed pavement preservation treatment comprised of asphalt emulsion, aggregate, water, and mineral filler. There are two basic products, slurry seal and micro surfacing. Slurry seal is typically applied on residential streets, airports, sidewalks,and parking lots. Micro surfacing is a premium product based on specially selected aggregates and polymer modified asphalt emulsion. Micro surfacing is designed to be applied in thicker lifts for high trafficked areas requiring heavier application rates and quick return to traffic. Micro surfacing is also used as a rut fill treatment.

How is a slurry seal or micro surfacing applied?

The raw materials are combined in a mobile mix unit. The slurry surfacing is applied to an existing pavement surface by means of a spreader box linked to the mixing unit. The slurry is introduced into the spreader box and is “laid down” as the mixing unit is driven forward.

What type of asphalt emulsion is suitable?

Slurry seal may use a variety of emulsions such as SS-1H orCQS-1H. Micro surfacing always uses a cationic polymer modified emulsion such as CSS-1HP. The emulsion type is selected on the basis of local specifications and through a laboratory mix design process, comprised of tests on the compatibility of the aggregate and the emulsion, and on the durability of the cured seals. See your state’s Product Locations & Applications page for more options.