Omans Desert Sunset Limestone can be used for exterior applications in cold climates, but it is important to consider a few factors:

1. Frost resistance: Cold climates often experience freezing temperatures, which can cause water within the stone to freeze and expand, leading to cracking and deterioration. It is crucial to ensure that the limestone is frost-resistant and has a low water absorption rate to minimize the risk of damage.

2. Thermal conductivity: Limestone tends to be a good conductor of heat, which means it can become cold to the touch in freezing temperatures. This factor should be considered if the limestone will be used in areas where people may come into direct contact with it, such as stairs or handrails.

3. Sealing: To enhance the durability and weather resistance of the limestone, it is recommended to apply a high-quality sealer that is specifically designed for exterior use. This will help protect the stone from moisture penetration and potential damage from freeze-thaw cycles.

4. Maintenance: Regular maintenance, such as cleaning and resealing, may be required to preserve the appearance and longevity of the limestone, especially in harsh winter conditions. This maintenance should be carried out according to the recommendations provided by the manufacturer.

By considering these factors and ensuring proper installation and maintenance, Omans Desert Sunset Limestone can be used successfully in exterior applications in cold climates. However, it is advisable to consult with a local expert or stone specialist to assess the specific requirements and suitability for your climate and project.