HIDROSAN ANTIALGAE PLASTER is an exterior wall coating based on siloxane polymers and acrylic resins. The product is highly breathable and water-repellent, and it offers excellent resistance to weathering. This coating adheres to both mineral substrates and old paints of mineral or synthetic nature, thus providing an alternative solution to lime-based or silicate-based mineral products for protection and decoration in the restoration of old buildings. It prevents the formation of mold and algae. Grain size: 1.5 mm.