The Bobos Sandstone from Indonesia can be used for exterior applications in hot climates. Sandstone is a durable and weather-resistant natural stone, known for its ability to withstand various weather conditions including heat. It has been used in various architectural and construction projects worldwide, including in hot climate regions.

However, it is important to note that the success of using Bobos Sandstone in exterior applications in hot climates may depend on several factors such as the quality and composition of the stone, installation technique, and maintenance. Proper sealing, periodic cleaning, and protection from extreme heat and temperature changes are necessary to ensure the longevity and performance of the sandstone.

Consulting with a local architect, builder, or stone specialist familiar with the specific characteristics and properties of the Bobos Sandstone would be advisable before proceeding with its use in exterior applications in hot climates.