How to Prepare a Road Surface Before Slurry Seal or Micro-Surfacing
2026.10.31
The quality of a slurry seal or micro-surfacing job is decided before the paver even starts. A poorly prepared surface undermines even the best mix. Here is the pre-construction checklist crews should complete.
1. Repair structural defects first
Fill potholes, patch deep ruts and seal active working cracks before any thin surface treatment. Slurry seal cannot bridge structural cracks - they will reflect through within a season.
2. Clean the surface
Sweep or blow off dust, loose aggregate, oil spots and debris. Emulsion bonds to a clean pavement; a layer of dust between binder and road causes the new surface to delaminate.
3. Check drainage and rain forecast
Blocked drains carry water across the job. Clear them, and confirm no rain is expected during application and the cure period. The surface must be completely dry - no morning dew.
4. Set traffic control
Plan the closure, detour and reopening time. Micro-surfacing needs a set cure before traffic; schedule so the fastest part of the day is used for laying.
Pre-job checklist
| Task | Why |
|---|---|
| Patch potholes / ruts | Remove structural defects |
| Seal working cracks | Prevent reflection cracks |
| Sweep / clean surface | Ensure emulsion bond |
| Check drainage & weather | Avoid water damage |
| Mark manholes & utilities | Protect and grade around them |
Why prep is the cheapest insurance
Spending a few days on surface prep costs a fraction of redoing a failed seal. A road that reaches the paver clean, dry and structurally sound will give the full 5-8 years of service life the treatment was designed for.
For product supply and technical support on your next preventive-maintenance job, contact our team.
