Yes, Germanys Londorf Basalt can be used for exterior applications in very rainy climates. Basalt is known for its high durability and resistance to weathering, making it suitable for various weather conditions, including heavy rainfall. It has low porosity, which means it has minimal water absorption, reducing the risk of damage or cracking due to excessive moisture exposure. Moreover, Londorf Basalt is often used for exterior applications such as paving, wall cladding, and landscaping due to its attractive appearance and ability to withstand harsh environmental conditions. However, proper installation techniques and regular maintenance are also essential for ensuring the longevity and performance of any natural stone in exterior applications.