slurry road surfacing An asphalt pavement that already exists can have a slurry road surfacing applied to it by applying a mixture of water, asphalt emulsion, aggregate (very small crushed rock), and additives to the surface of the asphalt. The difference between a fog seal and a slurry road surfacing is that the latter does not include particles in the mixture, while the former does. The term “slurry” refers to the combination that results when an emulsion and aggregates are mixed together. It is usual practice to incorporate polymer into the asphalt emulsion in order to improve the qualities of the combination. The “seal” is created by applying this mixture on top of the existing pavement in order to achieve the desired effect of sealing the pavement surface. Slurry road surfacing, commonly known as micro-surfacing is the most efficient and widely used optimum paving method.