Which type of coatings require water to complete the cure process?

Hydrolysis coatings are specifically designed to cure through a reaction with water. This type of coating relies on moisture to facilitate its chemical reaction and achieve the desired properties. The presence of water is essential in the curing process for hydrolysis coatings, allowing them to form cross-links and enhance the film's integrity and performance.

In contrast, polyureas, epoxies, and urethanes usually cure through a chemical reaction between specific resins and hardeners or through moisture from the environment but do not require water to complete their curing process as hydrolysis coatings do. Their curing mechanisms may involve evaporation of solvents or reactions that do not rely primarily on the presence of water. Thus, hydrolysis coatings stand out as the only ones that depend directly on water for curing, making them the correct choice for this question.