Six fiberglass casting tapes were evaluated in bending, using an unstable fracture model. Cylindrical casts were constructed and evaluated in bending at 2, 3, and 24 hours after application. Scotchcast Plus (3M, St. Paul, MN), Vet Cast II (3M), and Zim‐Flex (Zimmer, Warsaw, IN) were significantly stronger than other materials at 2 hours; however, by 24 hours, casts constructed from Delta‐Lite (Johnson&Johnson Products, New Brunswick, NJ) were strongest. Delta‐Lite Conformable casts were significantly weaker at all