Abstract: A tagging material for the production of electronic identification tags. Shown generally at (10) is a continuous tape of thermoplastic plastics material. The tape (10) comprises a film (12) having on an upper surface a coating (14) of release agent, and on a lower surface a coating (16) of adhesive. Below the adhesive coating 16 is a further film (18) having on its upper surface an antenna (20) and, electrically connected thereto an integrated circuit (22). On a lower surface of film (18) is a coating of pressure sensitive adhesive (24). The integrated circuit (22) is completely encapsulated in a flexible protective layer (26) of non-conductive waterproof material, which is preferably UV-curable, such as polyurethane.