This standard is specifically designed for evaluating the pull-off adhesion strength of coatings applied to concrete surfaces. Concrete presents unique challenges due to its porosity and varied surface characteristics. Similar to D4541, a dolly is glued to the coated concrete surface, and a force is applied. A key difference often involves scoring the coating around the dolly’s perimeter down to the concrete, and sometimes even coring a plug of concrete, to ensure the test measures the coating-to-concrete bond accurately. It addresses the specific considerations for testing on concrete, which can include substrate strength and preparation.