Coatings can be applied to various materials to give unprecedented functions or to prevent damage to the underlying surface caused by external factors. They can also enhance the value of objects through a variety of color and gloss characteristics. Appropriate resin selection is essential to meet specific application requirements. Epoxy resins, the main subject of this article, are widely used in coatings thanks to their excellent adhesion to materials and their durability. Bisphenol A- and bisphenol F-based epoxy resins and amine hardeners are common components of epoxy coatings. However, epoxy resins typically contain aromatic groups with strong absorption in the UV range. This makes epoxy structures vulnerable to UV degradation. Their poor UV light resistance limits their suitability for exterior applications. Light stabilizers retard the effects of UV degradation such as yellowing by screening UV light and by slowing down the rate of radical degradation reactions. Antioxidants further reduce the yellowing caused by heat. The performance of SONGWON stabilizers in a typical commercial epoxy resin with hardeners was tested and reviewed below.