Slurry Seal

Slurry Seal is a cold mix blend of high quality crushed aggregates, asphalt emulsion, water and mineral fillers, mixed together according to a predetermined mix design from a laboratory.

It is applied to an existing surface, such as surface treatment or pavements, that are still in fair to good condition, as a means of a cost effective preventative maintenance. It reduces deterioration by sealing, prevents further oxidization, corrects raveling and provides or replaces a high degree of skid resistance.

Slurry Seal is applied with a spreader box, which is connected to the slurry mixing unit, as shown on the right. The box is the width of a single lane, allowing a uniform spread of material in a single pass.

Crews ahead of the unit set up traffic control, and sweep the surface before applying the slurry seal. Operators of the units monitor the mixing and application. After a short curing time traffic will be allowed to resume use of the freshly rehabilitated lane.

There are three types of Slurry seal commonly used, each using a different size of aggregate;

  • Type I – Slurry Seal (Fine Aggregate,1/8” max) Used for lower traffic volumes and maximum crack penetration. Recommended application rates are 4.3-6.5 kg/m²
  • Type II – Slurry Seal (General Aggregate,1/4” max) Most commonly used slurry. Good for moderate to high volume roads. Recommended application rates are 6.5-10.8 kg/m²
  • Type III – Slurry Seal (Coarse Aggregate ,3/8”) Used for high volume roads and heavier traffic. Recommended application rates are 9.8- 16.3 kg/m²


For further information on how to make slurry seal part of your preventative maintenance program, or which type best suit your needs, contact us today, and protect your paving investments.

Phone: 705-730-1999
Fax: 705-730-7977

Duncor Enterprises Inc. – Ontario Slurry Seal road maintenance company.