Algicidal paint is a type of protective coating that contains chemical agents specifically designed to kill or inhibit the growth of algae on painted surfaces. These paints are commonly used in environments prone to moisture and humidity—such as coastal areas, bathrooms, or exterior walls—to prevent unsightly green or black algae buildup, which can degrade surfaces over time.
In Australia, algicidal paints are often used in both residential and commercial applications, particularly on exterior surfaces like rendered walls, roofs, and fences. They may be formulated as part of anti-fouling marine coatings or as additives in exterior acrylic paints. The algicidal properties help maintain the appearance and longevity of the painted surface, reducing maintenance needs and improving durability in damp or shaded areas.