Cotton Alabaster is a material often used for interior applications like countertops, tiles, and walls. While it is known for its durability, it may not be suitable for very rainy climates when used in exterior applications.

Extreme moisture conditions, such as heavy rain and prolonged exposure to water, can potentially cause damage to Cotton Alabaster when used outside. This material is more susceptible to water absorption, staining, and degradation over time when compared to other stones like granite or marble, which have better resistance to water.

If you are considering using Cotton Alabaster in an exterior application in a very rainy climate, it is recommended to consult with a professional or manufacturer to ensure it is suitable for your specific circumstances. They may be able to provide guidance on sealing treatments or alternative materials that are better suited for such conditions.