Yes, Grand Skylight Sintered Stone can be used for exterior applications in very dusty climates. Sintered stone is a highly durable, non-porous material that is resistant to stains, scratches, and UV radiation. It is also resistant to extreme temperatures and can withstand harsh weather conditions. Additionally, the non-porous nature of sintered stone prevents the accumulation of dust and dirt, making it easier to clean and maintain in dusty climates.