What CSP Profile Does Your Slab Need Before Coating?
Concrete Surface Profile (CSP) is the 1–10 scale defined in ICRI Guideline 310.2R that rates the texture of mechanically prepared concrete — CSP 1 is nearly smooth, CSP 10 is heavily roughened. Every resinous flooring system specifies the CSP range it bonds to: thin-film coatings anchor into lighter profiles, while trowel-applied mortars need aggressive texture. Match the profile to the system and the floor bonds for its service life; miss it and the floor peels.
Why Prep Decides Whether a Coating Succeeds
Most floor failures are prep failures. A resinous floor doesn't glue itself to concrete chemically — it keys into the texture mechanically. The primer flows into the peaks and valleys of the profile, cures, and locks the whole build-up to the slab. No profile, no key. That's why MavPrime EP, the penetrating 100% solids epoxy primer under every MavCoat system, is specified over CSP 3+ prepared concrete: it's engineered for a deep mechanical bond into the profile.
When prep is done right, the numbers show it. MavClad EM epoxy mortar posts a bond strength to concrete of 350 psi per ASTM D-4541 — reported as concrete failure, meaning the slab itself breaks before the bond line does. That result is only possible on a sound, profiled substrate. Coat over laitance, sealers, or a burnished trowel finish and the bond line becomes the weakest layer in the floor.
Profile Is Step One, Not the Only Step
- Sound concrete first. Spalls, pop-outs, and failed joint shoulders are repaired with MavPatch Epoxy before any coating — see our concrete floor repair service.
- Joints stay joints. MavJoint JF semi-rigid joint filler honors moving joints through the new floor instead of coating over them.
- The profile is written into the scope. The prep method is specified to the CSP profile the system requires — not left to the crew's judgment on the day.
- Moisture is measured, not assumed. Every assessment includes moisture testing before a system is specified (see the sidebar below).
CSP Ranges, Prep Methods, and the Systems That Bond to Them
ICRI 310.2R defines ten replicate profiles, CSP 1 through CSP 10. In practice, industrial floor work lives between CSP 2 and CSP 5 — here's how the ranges map to prep methods and to Maverick build-ups.
| CSP | Method | Typical Maverick Systems |
|---|---|---|
| CSP 1–2 | Light diamond grinding | Too smooth for most industrial builds on its own — a starting point that gets taken further before priming. |
| CSP 2–3 | Diamond grinding or shot blast | MavCoat FC / MavSeal UPA fast-cure systems — installed over diamond-ground or shot-blast concrete, CSP 2–3. |
| CSP 3+ | Shot blasting or diamond grinding | MavCoat epoxy systems over MavPrime EP, the bond coat under every MavCoat system; MavCrete urethane cement and MavTop broadcast build-ups per their details — substrate prepared to CSP 3+ per ICRI 310.2R, clean, sound, and dry. |
| CSP 3–5 | Shot blasting; scarifying at the top of the range | MavClad EM ¼″ trowel-applied epoxy mortar — MavPrime EP over CSP 3–5 prepared concrete. |
| CSP 6–10 | Scarifying / rotomilling | Beyond coating prep — profiles this aggressive precede overlays and repair mortars, not thin-film systems. |
The rule of thumb: the thicker the system, the rougher the profile it needs. A fast-cure film build anchors into CSP 2–3; a quarter-inch mortar needs CSP 3–5 to grip. Specifiers can see every build layer-by-layer in the System Builder.
Shot Blast vs. Diamond Grind vs. Scarify
Three machines, three profiles, three jobs. The scope picks the method — the method doesn't pick itself.
Diamond Grinding
Rotating diamond-segment plates abrade the surface flat. It's the precision tool: it removes old coatings, laitance, and trowel burn, flattens high spots, and reaches edges, corners, and door thresholds that other machines can't. Produces the lighter profiles — roughly CSP 1–3.
Shot Blasting
Steel shot is thrown at the slab and recovered in a closed, dust-collected loop, fracturing the surface into a uniform anchor profile in a single pass. It's the production workhorse for open floor area, delivering the CSP 3–5 range most industrial build-ups specify. Edges still get ground by hand.
Scarifying
Carbide cutter drums chip the surface away rather than abrading it — the aggressive end of the scale, and the tool for removing thick overlays, heavy build-ups, or badly deteriorated surface layers. The torn profile it leaves typically precedes a mortar or overlay, not a thin coating.
What the Crew Actually Does
On most Maverick installs the methods work together: shot blast the field, grind the edges and terminations, and repair as you go — grinding, patching, and joint repair first, then the coating. It's the same sequence on every floor, from a beverage bottling plant in Detroit to forklift aisles in a Michigan distribution warehouse: mechanical surface preparation to the specified concrete surface profile, then repairs, then the system.
Surface Prep Questions, Answered Straight
Can you acid-etch a floor instead of grinding or blasting it?
No. Every install starts with mechanical preparation — diamond grinding or shot blasting to the specified CSP profile. Acid etching leaves the profile dependent on how the acid was mixed, spread, and rinsed, and it introduces water and residue into the slab. A mechanical profile is measurable, repeatable, and written into the scope, not left to judgment on the day.
What CSP profile does an epoxy floor need?
MavPrime EP — the penetrating 100% solids epoxy primer that is the bond coat under every MavCoat system — goes over CSP 3+ prepared concrete. The MavCoat FC / MavSeal UPA fast-cure system installs over diamond-ground or shot-blast concrete at CSP 2–3, and MavClad EM ¼″ trowel-applied epoxy mortar takes CSP 3–5.
Do you test for moisture as well as profile?
Yes — moisture testing is part of every site assessment, because moisture vapor is a leading cause of coating failure. We verify moisture vapor emission per ASTM F1869 and relative humidity per ASTM F2170. Where mitigation is required, the build-up starts with MavCoat MVB, our moisture vapor mitigation primer, instead of the standard MavPrime EP prime coat. We never coat over an unmeasured slab.
The prep, the repairs, and the coating come from one accountable party — the same company that manufactures all nine Mav product families and 25 products installs them. See how that changes the bid on our epoxy flooring contractor page, or how prep anchors slab restoration on the concrete floor repair page.
Not Sure What Profile Your Slab Needs?
Tell us the square footage, what's on the floor now, and what the space does. An engineered prep-and-system recommendation comes back within 48 hours — that's our promise.