A pull-off test is a method used to measure the adhesion strength of coatings, such as paint or protective layers, to a substrate. In this test, a specialized instrument applies a controlled force to a small area of the coating until it detaches from the surface. The amount of force required to pull the coating off indicates how well it adheres to the underlying material. This test is commonly used in industries like construction and manufacturing to ensure quality and durability. It helps assess the performance of materials like epoxy, polyurethane, and other coatings, ensuring they meet safety and reliability standards.