Oxidized Bitumen 85/25 (Blown Asphalt 85/25, Bitumen 85/25, R85/25, OXIDIZED BITUMEN 85/25) is a top-tier asphalt binder known for its remarkable properties. Featuring a balanced composition. Oxidized Bitumen 85/25 is a top-tier asphalt binder known for its remarkable properties. Featuring a balanced composition, it offers an optimal combination of hardness and flexibility, making it suitable for a variety of applications.