Three methods for determining the flexibility of putty coatings

The flexibility of putty coatings can be tested using several methods. Here are three commonly used methods:

    Bend Test: In this test, a coated panel is bent over a specified diameter mandrel or rod, and the adhesion and flexibility of the putty coating are evaluated visually or by measuring the extent of cracking or delamination. The coated panel is typically bent at various angles or repeatedly bent to simulate real-world conditions.

    Conical Mandrel Test: This test involves wrapping a coated panel around a conical mandrel of a specified diameter, and then visually inspecting the coating for cracking, delamination, or other signs of damage. The diameter of the mandrel can be adjusted to simulate different levels of flexibility or strain on the putty coating.

    T-Bend Test: In this test, a coated panel is bent at a 180-degree angle around a T-shaped mandrel, and the coating is examined for any signs of cracking or delamination. This test is commonly used for evaluating the flexibility of thin coatings, such as those used in automotive and aerospace industries.

It's important to note that the specific testing procedure and criteria for pass/fail may vary depending on the industry, application, and standards followed. Therefore, it's essential to consult relevant industry standards or specifications to ensure accurate and consistent testing of putty coatings' flexibility.