Finanox 18 is a secondary antioxidant used in polymers, especially in polyolefins, to provide long-term heat aging properties. It works synergistically with primary antioxidants to decompose hydroperoxides, which form during polymer degradation. This helps minimize discoloration in various applications such as automotive parts, appliances, PE films, and injection molding. Finanox 18 is particularly effective in formulations containing fillers and pigments, making it relevant for industries focused on maintaining polymer stability under heat stress​