A local vendor for such a product convinced the FHWA to spec their product as a dust palliative and to protect a prepared subgrade for a major highway project. The subgrade was fine volcanic ash. The rest of the pavement structure was to be constructed on a future phase of the project so the completed subgrade had to remain in place for an extended period before asphalt base and surface courses. The material was very pricey vs. the alternatives, and the alternatives probably would have also worked, but the product performed as advertised and did an excellent job of both controlling dust and protecting the subgrade, even when later subjected to heavy construction traffic. No cement was used, and the product was not mixed into the subgrade material. It was diluted in the water wagon and simply sprayed over the surface. Penetration was excellent. The product itself looks like, smells like, and to casual observation seems to act like Elmer's Glue. I would judge its performance as excellent, but question whether its expense would be justified over less costly alternatives in many applications - same as Ron said with his far fewer words!
