Yes, Saltillo Terracotta can be used in exterior applications in very sunny climates. Saltillo Terracotta is a type of clay tile that is known for its durability and ability to withstand harsh weather conditions. It is commonly used in outdoor spaces such as patios, courtyards, and walkways. However, it is important to note that Saltillo Terracotta is a porous material and may require regular sealing and maintenance to protect it from the suns UV rays and prevent fading or discoloration. Additionally, proper installation and maintenance practices such as applying a high-quality sealant, cleaning, and resealing periodically can help to extend the lifespan of Saltillo Terracotta in sunny climates.