For epoxy coatings to be applied on concrete floors, the concrete surfaces must have completed a 28-day curing period and possess sufficient strength.
The concrete must have a minimum compressive strength of 25 N/mm² and a minimum tensile strength of 1.5 N/mm².
The surface must be clean, smooth, and dry, and the moisture content of the concrete must not exceed 5%.
For epoxy coatings applied on concrete surfaces with the specified requirements, the performance values must comply with TS EN 1504-2.
One of the most common problems in epoxy flooring systems is insufficient adhesion of the applied epoxy to the concrete surface, resulting in poor bonding or complete detachment from the substrate.
According to TS EN 1542, which is referenced within TS EN 1504-2, the adhesion strength of the epoxy coating is determined using a Digital Pull-Off Test Device (determination of bond strength by pull-off method). This test is used to verify and declare the performance of the epoxy coating on concrete surfaces.
Based on the results obtained after a 7-day curing period of the epoxy coating, the minimum required adhesion strengths are:
- For surfaces without traffic load: ≥ 1.0 N/mm²
- For surfaces with traffic load: ≥ 1.5 N/mm²
