Chip Seal Asphalt

Trap Rock Chip Seal

Trap Rock Chip Seal

Cost-effective Driving Surface

Chip seal is used as a cost effective asphalt surface treatment.  The completed driving surface will perform for several years with minimum maintenance costs.  The finished product will provide an all weather, skid resistant surface that produces a water resistant layer.


Chip Seal, at its core, is the application of a liquid polymer modified emulsion (usually CRS-2P or CHFRS-2P) immediately followed by an application of an aggregate (Rock and oil!).  The aggregate is then rolled and embedded into the binder, meanwhile the binder “weeps up” and fills the voids between rocks.  Chip Seals are used to protect a weathered surface by sealing the old asphalt to prevent moisture from entering the pavement.  Chip Seal provides numerous benefits:

  1. Excellent skid resistance
  2. Great durability
  3. Prevention of minor raveling
  4. Seals cracks and water penetration points
  5. Extremely cost effective vs. traditional overlays (approximately one quarter of the cost)
  6. Quick setting and minimal traffic disruption

West Contracting’s Promise

West Contracting follows rigorous benchmarks to insure this application is completed properly.  We install Chip Seals from Mid-May to Mid-September as the product is temperature sensitive. First, the existing surface must be completely clean of vegetation, dirt, dust, and loose rock.  We send a crew a day ahead or the morning of the application to clean, sweep, and blow the road off.  Next, we apply the liquid polymer modified binder at a rate of .25-.40 gallons per square yard by a pressurized distributor.  The emulsion rate is dictated by the existing surface conditions and aggregate chosen for the project.  Immediately following the emulsion (30-120 seconds), clean-aggregate is placed through a computerized, self-propelled chip spreader. The self-propelled chip spreader applies the aggregate at a uniform rate over the prepared surface (typically 15-30 lbs/per sq. yd). The most common aggregates used in Missouri are trap rock (blue/grey granite), crushed river gravel, and limestone – placed between 1/4″ to 1/2″.  The aggregate application is then rolled into the binder with a pneumatic 9-wheel rubber tire roller.  Approximately one week after the application West Contracting sweeps the loose rock off of the new surface.

West Contracting completes residential driveways, private streets, municipal streets, county work and MoDOT state work during the chip seal season.  If you would like more information on Chip Seal surface treatments, contact us today and one of our project managers will be glad to talk to you about your specific needs.



Queeny Park Parking Lot – 2014



University City Private Subdivision – 2014

Protecting Cobblestone Edging


Hand Spray By Cobblestone Edging

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