Prime and Seal

A prime and seal is a two-stage process. The first stage is a primer without cover aggregate. It is used to bind the surface of an unbound granular layer, provide a bond onto which a bituminous surfacing can adhere, and to provide a surface that minimises absorption of the binder from the seal coat into the pavement. The second stage is a binder sprayed onto the primed surface, covered with a layer of aggregate, rolled and opened to controlled traffic. This provides a wearing surface for traffic and waterproofs the pavement.

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External Links & References

  1. Wikipedia
  2. Google Search
  3. Work Tip No.18 - Sprayed Sealing - Selection of Initial Treatments
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