Which factor most directly influences the Class 5 Finish Coating Rate?

• A. Temperature
• B. Surrounding concrete strength
• C. Time of day
• D. Surface roughness

Answer: (B)

The rate at which a Class 5 finish coating can be applied is governed most directly by the substrate’s ability to receive and bond the coating—i.e., the surrounding concrete strength. A solid, strong base provides a stable, non-deflecting surface that resists gouging or surface damage during troweling and pressuring of the coating. When the surrounding concrete is strong, the finish can be laid down smoothly and consistently, allowing a faster, more predictable application rate without frequent pauses for surface repairs or bond concerns.

Temperature, time of day, and surface roughness influence how the coating behaves and how the final surface looks, but they don’t control the fundamental capacity of the surface to accept and hold the coating the way substrate strength does. A strong substrate reduces risks of delamination, crazing, or surface imprinting during finishing, enabling a more efficient application process.