This efficient method for preparing footprints and tire tracks found in loose or sandy soil is newly packaged in aerosol form. Features a quick-drying, clear acrylic formula that adds superior strength to impressions—lessening the chance of detail damage due to the weight of the casting material. Works great with Arrowstone. One 15-ounce can of Dust and Dirt Hardener is enough to make up to 30 full-size adult shoe impression applications.