The evaluation of the speed of defoamer to eliminate foam in building materials is usually measured by the time required to eliminate a certain amount of foam. Investigate the inhibiting effect of defoamer on foam for a long time to ensure that foam will not be generated during construction. Evaluate the impact of defoamers on the strength,

durability, surface glossiness, and other properties of building materials to ensure that they do not affect the final product quality. Test the environmental indicators and safety performance of defoamers to ensure that they are non-toxic, harmless, biodegradable, and comply with relevant regulatory requirements.