The aim of this report is to review and evaluate the accumulated experience in the use of bituminization techniques for the immobilization of radioactive wastes, including the description of incidents which have happened at bituminization facilities, and to give an assessment on the role of bituminization processes in the strategy for radioactive waste management. Contents: 1. Introduction; 2. Characterization of bitumens used for waste immobilization; 3. Types of radioactive wastes suitable for immobilization in bitumen; 4. Immobilization processes: Operational and safety aspects; 5. Properties of bituminized waste forms; 6. Conclusions; Annex: Application of bituminization processes in some Member States.