While standard windows filter ultra violet rays sufficiently for any type of indoor application, epoxy is not recommended for use in outdoor applications where it will receive direct, unfiltered sunlight. Cement is typically used for outdoor terrazzo applications. However, there are some options for the exterior use of epoxy terrazzo, including the addition of UV inhibitors to the formula, use of a special, naturally UV resistant epoxy, and protective coatings. These approaches should be reserved for applications that can support substantial additional cost.
Posted in: INSTALLATION AND USAGE QUESTIONS