The Grigio Argento Limestone is not recommended for exterior applications in very sunny climates as it is susceptible to weathering and erosion due to prolonged exposure to the sun and rain. This may cause discoloration, fading, and the development of a rough texture. It is best used for interior applications such as flooring, wall cladding, and countertops. If you still want to use it for exterior applications, it is important to properly seal the stone and maintain it regularly to ensure its longevity.