Abstract: The novel splint-cast, before use, is a longitudinally flexible strip consisting of fibreglass reinforcing mat overlying and sealed adjacent an insulating layer at least partially by a non-permeable wrap material. On the other side of the insulating layer is a liner material of preferably a wool/cotton composition. The splint-cast blank may be prepared for use by passing a curable hardening agent into a vacuumed envelope formed by the wrap and the insulating material or the wrap and a latex layer, the fibreglass reinforcing mat absorbing the hardening agent along the length of the splint-cast blank. Before the hardening agent sets, the splint-cast is applied to an injured limb as a bandage but with consecutive wrappings about the limb in spaced relationship to each other. The splint-cast is simple and convenient to both prepare for use and apply. The open wrapping nature of the splint-cast on an injured limb permits air circulation while also providing desired firm support.