Yes, Omans Desert Sunset Limestone can be used for exterior applications in hot climates. Limestone is a durable natural stone that can withstand high temperatures, making it suitable for outdoor use in hot regions. However, it is important to note that the specific performance and suitability of the stone may vary depending on factors such as the specific type and grade of limestone, local climate conditions, and the installation and maintenance methods used. It is recommended to consult with professionals or experts in the field of stone installation to ensure proper selection, installation, and care of the limestone in hot climate environments.