Hydroxyethyl Cellulose (HEC) is widely used in exterior wall coatings. The following are some common applications and characteristics of hydroxyethyl cellulose in exterior wall coatings: Viscosity adjustment: Hydroxyethyl cellulose can adjust the viscosity of the paint, making it easier to apply and spread. It can increase the viscosity of the paint, prevent the paint from running and dripping, and improve the adhesion and coverage of the paint. Improve leveling: Hydroxyethyl cellulose can improve the leveling of paint, making the paint more smooth and even when applied. This helps reduce bubbles, spots and texture on the paint surface, providing a more aesthetically pleasing finish. Increase crack resistance: Hydroxyethyl cellulose can increase the flexibility and crack resistance of coatings. It creates a kind of network structure in the paint, which increases the strength and durability of the coating and reduces the risk of cracking and peeling.