Technical FAQ

Technical FAQs for DustOut™

What is DustOut?
DustOut is a proprietary blend of 100% organic botanical ingredients and food grade acids. It is used for landfills, road banks, construction and demolition sites, stockpiled topsoil, airport runway and taxiway shoulders, helipads and most slopes and berms, livestock areas, motor sports tracks, hydroseeding, and erosion control applications.

How does DustOut work in controlling dust emission?
DustOut retains moisture. When applied to the unpaved surface, it coats both fine and coarse particles, aggregating them together. DustOut coated surfaces become hygroscopic and deliquescent (moisture retaining). The aggregates remain moist and prevent captured fine particles from being airborne when disturbed.

How does DustOut work to stabilize the unpaved surface?
Fines are the cementing materials for the aggregates of the unpaved surface. DustOut treatment retains these fines in the aggregate and increases the cohesion between them, resulting in high-density compaction, and improved durability of the surface. DustOut treatment allows moisture to be retained into the unpaved surface material for longer periods of time. The surface can be compacted to maximize its density.

Does DustOut really improve the unpaved surface quality while reducing the total maintenance costs? DustOut provides dust control and stabilization benefits at the lowest overall cost when compared to alternative products and application methods. DustOut treatment results in the formation of several inches of dense surface. This surface requires less maintenance by substantially reducing the number of required blading. This prevents the loss of aggregates and reduces the spot repairs due to frost heaving.

What kind of equipment do I need to use for DustOut?
DustOut can be applied simply by a water wagon or by an oil dispenser.

When is the best time to apply DustOut to an unpaved surface?
DustOut can be applied year round, but at a slightly lower concentration during the winter months due to higher crystallization temperatures that exist in the higher concentration products. For example, the crystallization temperatures for 38, 35 and 30 percent by weight concentrations are about 42°F, 14.5°F and –50°F, respectively.

How long will DustOut last in the treated surface?
Longevity of the application of DustOut is dependent upon the characteristics of the unpaved surface and the traffic volume. Normally, application twice a year is adequate on low traffic volume unpaved county roads. A booster application may be necessary on heavily traveled roads.

What is the appropriate DustOut application rate?
Application rate is dependent upon the composition of the unpaved surface material. Normally, the range is 1 gallon of mix per 2.4 yd² or 2 liters mix per square meter. A 4,000-gallon truckload will typically treat 0.84 mile of a 16 ft. wide strip (1.34 kilometers of a 6 meter width).

Is DustOut applied at the strength it is at when delivered to the customer?
DustOut is shipped in highly concentrated form, and it is meant to be diluted based on the needs of the clients’ specific needs.

Do I need to dampen the surface with water before applying DustOut?
Water damping is not necessary before application.

Do I need to keep the unpaved area closed to traffic during or just after the application of DustOut? No. The area does not have to be closed to traffic. The section being treated could be used immediately after the application of DustOut. The movement of traffic will actually improve the compaction of the surface. In fact, no additional compaction is required after the unpaved surface has been treated.

Do I need to scarify the surface before the application of DustOut?
Scarification is recommended, as it will improve the penetration of DustOut into the unpaved surface. It will also increase the compaction density and ultimate stability of the treated area.

When should I add new materials to the unpaved surface?
Add new materials when the fines content (minus 200 meshes) is low (less than 10 percent by weight). This is not uncommon in untreated surfaces, as the fines are easily removed by wind and by the moving vehicles. Because fines are the cementing materials which bind the larger gravel, a surface that is devoid of or is low in fines content loses coherence and becomes raveled.

What is the best kind of material to use as surface material on unpaved surfaces for the most effective application of DustOut?
We recommend limestone with fines (minus 200 meshes) content greater than 15 percent by weight. The percentage of large gravel (plus 3/8 inch) needs to be maintained at low level. Preferably, there should be no material thicker than 1 inch.

How important is the maintenance of the ditches alongside the unpaved roads?
Ditches filled with gravel and vegetation impedes water flow during rain, and can lead to flooding of the road surface. With time, this flooding could wash away the fines in the road bead, rendering it unstable. For better drainage, it is also important that road surface is graded, leaving a crown in the center of the road. The ditches should be pulled during the pre-application process to gather lost aggregates, and to allow the free flow of the draining rainwater.

Can I apply DustOut over old chip and seal or broken up asphalt?
Yes, application of DustOut will reduce the dust level. However, a complete treatment of the bed with DustOut will provide better cohesion and render more stability to the surface. This will require scarification and/or pulverization of asphaltic materials and the aggregates (which were blended with the native material prior to the application of DustOut).

Is DustOut a corrosive substance?  No. DustOut is not made of corrosive substances like Calcium Chloride.

What are the safety and environmental benefits of using DustOut?
By drastically reducing the dust emission, treatment with DustOut improves visibility for the motorist. It also eliminates health hazards otherwise posed by the dusty air environment, and improves the comfort level of residents and workers along the roadside. DustOut is 100% organic and environmentally safe for the soil and roadside vegetation.

How does the cost of DustOut compares to Calcium Chloride?
DustOut has an average cost of $0.07 cents per lb. or less, depending on the quantity purchased. The retail cost of Calcium Chloride at your local hardware store is around $0.66 cents per lb.


If you can’t find an answer to your question in the DustOut FAQ, please don’t hesitate to email us at