Does the acidity of pet waste degrade marble outdoor pet waste bins over time?

Yes, the acidity of pet waste can degrade marble outdoor pet waste bins over time. Marble is a calcareous stone primarily composed of calcium carbonate, which is highly reactive with acids. Pet urine and feces contain various acidic compounds, such as uric acid and other organic acids. When these acidic substances come into contact with the marble surface, a chemical reaction occurs. This reaction dissolves the calcium carbonate, leading to etching, which manifests as a loss of polish, a dull appearance, and surface pitting or roughness. Over repeated and prolonged exposure, this acid erosion can cause permanent staining, weakening of the stone's structure, and significant aesthetic damage. While marble is durable, it is not impervious to chemical attack. To mitigate this degradation, immediate and regular cleaning to remove waste is crucial. Applying a high-quality penetrating sealer designed for marble can also provide a protective barrier, reducing the stone's porosity and its direct contact with acidic waste. Therefore, while marble bins offer an elegant outdoor solution, their longevity is compromised without proper maintenance against the acidic nature of pet waste.