Concrete Prep & Moisture Testing Quiz
Answer each question, reveal the answer, and test your knowledge before you hire.
Q1. What is the recommended concrete cure time before coating?
New concrete must cure a minimum of 28-30 days so the pH normalizes and excess moisture drops to safe levels.
Q2. What is the minimum compressive strength required for the substrate?
2,500 psi. Weaker slabs need evaluation before a coating system is specified.
Q3. What Concrete Surface Profile (CSP) does a heavy epoxy system need?
A CSP of 3-4, achieved by heavy diamond grinding or shot blasting — opening the pores for a strong mechanical bond.
Q4. How do moving cracks get handled before coating?
They are routed, cleaned, and filled with a flexible polyurea or epoxy joint filler so movement does not telegraph through the coating.
Q5. Why is acid etching not enough for tightly troweled concrete?
Etching lacks the power to open dense, tightly troweled surfaces or remove existing sealers and oil contaminants — leading to bond failure.