Yes, Catu Grey Sintered Stone can be used in exterior applications in hot climates. Sintered stones are known for their exceptional durability and resistance to extreme weather conditions, making them suitable for outdoor use. Catu Grey Sintered Stone is highly resistant to UV radiation, heat, and frost, making it an ideal choice for use in hot climates. However, it is always recommended to consult with a professional installer or manufacturer to ensure proper installation and maintenance protocols are followed.