Industry guidelines for creating surface profiles

The International Concrete Repair Institute (ICRI) has created a technical guideline #03732, “Selecting and specifying concrete surface preparation for sealers, coatings, and polymer overlays.” This guideline provides concrete surface profiles of CSP 3 to 9 which are used under the following conditions.

• For coating applications from 4–5 mils in thickness, the surface profile shall be a CSP 3. This is known as a light shotblast.
• For coating applications from 15–50 mils in thickness, the surface profile shall be a CSP 4 or 5. This is known as a medium shotblast.
• For coating applications from 40 mils to 1⁄8" in thickness, the surface profile shall be a CSP 5 or 6. This is known as a medium-heavy shotblast.
• For topping applications from ¼" to ½", the surface profile shall be a CSP 6 or 7. This is known as a heavy shotblast.
• For concrete overlays greater than ½", the surface profile shall be a CSP 8 or 9. This is known as an extreme shotblast.

International Concrete Repair Institute (ICRI) Concrete Surface Profile (CSP) Scale

CSP 1 (acid etched)	CSP 2 (grinding)	CSP 3 (light shotblast)
CSP 4 (medium shotblast)	CSP 5 (medium-heavy shotblast)	CSP 6 (heavy shotblast)
CSP 7 (heavy shotblast)	CSP 8 (extreme shotblast)	CSP 9 (extreme shotblast)

*Industry test results indicate that this Concrete Surface Profile offers no improvement in adhesion with overlays, compared to that of CSP 7.

For more information about shot blasting, surface preparation or other services available from Shot Blast Inc., or call at 610.494.1330.

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