The epoxy is peeling or “letting go” from either the concrete or between layers of coatings.

Delamination from substrate:


Improper Cleaning: The epoxy will not adhere to dirt, grease, or other contaminants.

No Primer Used: When priming is skipped, delamination may occur.

Moisture Vapor: Water vapor penetrating up through the substrate can cause peeling or delamination. After removing the problem areas, you may notice the concrete being dark from being damp.


Improper Cleaning:

• The coating must be removed by grinding or blasting.

• Re-applying the epoxy after proper preparation.

No primer Used:

• Remove the coating by suitable means.

• Prime and recoat after proper preparation.

Moisture Vapor

• Remove coating by suitable means.

• Measure moisture level; consult product data sheet and/or dealer before reapplying.


Improper Cleaning: Properly clean the substrate and provide a suitable profile by mechanical grinding or shot blasting.

No Primer: Use a suitable primer or prepare a primer following directions.

Moisture Vapor Transmission:

• Substrates should have a properly installed and effective vapor barrier if in contact with the ground.

• Always perform a calcium chloride test prior to installation. Test results should be no more than 4 pounds per 1,000 square feet per 24 hours.

• Approved primer systems should be used on readings that are higher and/or mitigate the moisture levels.