There are many types of plaster, including gypsum, lime, cement, fibrous, and exterior fire proofing. It can be used as a coating for interior walls, as a binder for brick walls, or as a sculpted material for moldings, ceilings, or frescoes. One of the most common applications is when building interior walls. Instead of drywall or sheet rock, use plaster, because it is harder, durable, and long lasting (it can last for centuries). It can also be molded into intricate decorations for paneling, moldings, cornices, and trim, etc. Fire proofing plaster is used as an exterior coating on walls and chimney areas.