Application Technical Note: Concrete Surface Preparation
General Discussion: This provides recommendations for conditioning and preparing concrete surfaces for installation of polyurea systems.
There is no such thing as too much surface preparation. Good enough generally isn’t good enough. Regardless of system selected, poor preparation may waste money and effort. Poor preparation will certainly result in less than satisfactory results and lessen system life cycle. Preparation cost should in no way be tied to cost of material being installed. Both are independent components of the cost of system installed.
In general, concrete must be structurally sound, dry and clean for successful applications of polyurea systems. Although some proprietary systems may be applied to “green” (recently placed) or wet concrete their use should be based on recommendations and detailed instructions of the system manufacturer. Further, some coating systems require a uniformly smooth or roughened surface for proper application. Consistency of preparation is important. Use of preparation specialists may be required. Investigation of surface receiving the system must be undertaken in cases where old concrete is involved. New and old concrete may be contaminated.
Outline of Surface Preparation Process – discussed in (much) more detail in PDF download:
- General Discussion
- Contamination of Concrete
- Repair of Surface Defects
- Repair of Structural Defects
- Flowing Water or Excess Dampness
- Surface Preparation Contractor
- Methods of Surface Preparation
- Quality Assurance of Surface Preparation
- Minimum Acceptable Levels of Preparation for Variously Affixed Systems