Fog sealing rejuvenates the asphalt surface, seals small cracks, reduces raveling (loss of aggregate), and provides a waterproof layer.

It helps extend the life of the pavement and improves its appearance. Fog Sealing also gives the surface a black appearance which is often requested by the customer and public.

Fog Coating is an application of a diluted asphalt emulsion to an aged (oxidized) pavement surface. Fog Coats are a standalone low-cost pavement preservation applications used to rejuvenate asphalt surfaces, seal small cracks and inhibit raveling. Fog Coats are commonly used on older asphaltic roads and cold mix pavements.


Issues Addressed

  • Minor surface cracks

    Fog seal treatments can help seal and fill in minor surface cracks on the pavement. The asphalt emulsion penetrates the cracks, sealing them and preventing water from getting in. Water can cause further damage through freeze-thaw cycles.

  • Oxidation

    Over time, exposure to sunlight and oxygen can cause the asphalt binder in pavement to oxidize, resulting in pavement aging and brittleness. Fog seal acts as a protective barrier, shielding the pavement from the harmful effects of UV rays and oxidation.

  • Raveling (due to segregation or poor compaction)

    Fog seals can help bind loose aggregate particles and improve the bond between the aggregate and the asphalt binder. The emulsion in the fog seal fills the spaces and reinforces the surface. It reduces the risk of more raveling.


  • Protects the pavement structure from moisture intrusion and oxidation
  • Improves pavement life and may delay the need for major maintenance or rehabilation
  • Improves road safety by enhancing color contrast between pavement surface and road markings 

Common Combinations

  • Chip seal + Fog seal
  • Full Depth Reclamation + Fog Seal
  • Cold In Place Recycling + Fog Seal

Western Asphalt Products have a variety of applications

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