Which casting material is known to be more water-resistant?

Fiberglass is the casting material known for its superior water resistance compared to other options. This property is largely due to fiberglass being composed of woven glass fibers encased in a resin. This combination allows it to repel water effectively, making fiberglass casts suitable for patients who may encounter water exposure during daily activities or rehabilitation.

In contrast, plaster of Paris, while commonly used for its easy application and moldability, absorbs moisture and becomes heavy when wet, leading to potential complications such as skin irritation or delayed healing. Wax casts are not typically used for long-term immobilization but instead serve specific purposes, such as for temporary support or as part of a splinting protocol. Elastic bandages primarily provide compression and support, lacking the rigid structure required for immobilization inherent in casts but do not offer the same level of water-resistant protection as fiberglass.