Water-repellent coatings are specialized surfaces designed to repel water and prevent it from soaking in. These coatings create a barrier that causes water to bead up and roll off, rather than spreading out and penetrating the material underneath. They are commonly used on various surfaces, including fabrics, glass, and metals, to enhance durability and maintain cleanliness. These coatings work through a process called hydrophobicity, which means they have a low affinity for water. Many water-repellent coatings are made from materials like silicone, fluoropolymers, or nano-coatings, which provide long-lasting protection against moisture and stains.