ASTM D6904-03 (R2013) PDF Download

ASTM D6904-03 (R2013) is a standard practice that provides guidelines for evaluating the resistance of exterior coatings applied on masonry to wind-driven rain. The purpose of this practice is to simulate the conditions of continuous water spray (rain) and dynamic wind pressure equivalent to a 98 mph wind velocity. The objective is to determine whether the coating system is capable of withstanding these conditions without showing any signs of water leaks or weight gain.

The standard outlines the specific parameters and procedures for conducting this evaluation. It emphasizes the importance of testing the ability of coatings to resist the passage of water through masonry blocks when exposed to water spray and air pressure.