Ensure the exterior wall surface is clean, dry, and free from dust, loose particles, oil, and algae. Repair cracks and surface imperfections using suitable fillers or polymer mortar before application. Stir the Raincoat WPC thoroughly before use to achieve a uniform consistency. Apply the first coat evenly using a brush, roller, or spray over the prepared surface. Allow the first coat to dry for 4–6 hours depending on weather conditions. Apply the second coat perpendicular to the first for complete coverage and uniformity. Protect the coated surface from rain and moisture for at least 24 hours after application. Allow proper curing to achieve maximum waterproofing efficiency and long-lasting durability.