RonaBond Crack Bridging Anti-Carbonation Coating WB is a façade coating formulated on a water based acryl siloxane. It is used as a waterproof decorative coating and can be applied to most traditional building surfaces after suitable preparation. The addition of siloxane improves shedding of pollutants from the surface and resistance to migration residues from the substrate. RonaBond Crack Bridging Anti-Carbonation Coating WB is a high build elastomeric, waterproof and carbonation resistant coating. It protects facades against water ingress while allowing diffusion of normal levels of moisture vapour from the background. When applied to reinforced concrete it provides excellent protection against corrosion of reinforcement.