ASTM D8380-21 is a standard test method for testing the dry abrasion resistance of hydrophobic and totally hydrophobic coatings. This method uses a specially designed Abraser to simulate the abrasion that may be encountered in actual use of intermediate coatings to evaluate the abrasion resistance of coatings. The standard specifies the test conditions, the requirements of the Abraser, and the steps of the test process. At the same time, it also provides a method for calculating and reporting the results. This standard method is suitable for various types of hydrophobic and totally hydrophobic coatings, including but not limited to waterproof coatings, oil-proof coatings, etc. Through this standard method, reliable abrasion resistance testing data is obtained, which provides reference for the design, production and use of coating products.