Plaster is a building material used for the protective or decorative coating of walls and ceilings and for molding and casting decorative elements. The process of covering surfaces with plaster is called Plastering.

Cement Plaster is a mixture of suitable plaster, sand, cement and water which is normally applied to masonry interiors and exteriors to achieve a smooth surface.

A plasterer applies plaster and cement mixtures to walls, flooring and ceilings, fixes fibrous sheets and cast and does ornamental plasterwork to the interior or exterior of buildings.

In protective covering, the plaster protects from outdoor elements such as wind and rain. As a decorative finish, plasters are used to give many appealing shades and finish designs to the construction.

Interior surfaces sometimes receive a final layer of gypsum plaster. Walls constructed with stock bricks are normally plastered while face brick walls are not plastered. Various cement-based plasters are also used as fireproofing products. These usually use vermiculite as lightweight aggregate.

There are many attributes to plaster as it provides a uniform, smooth, regular, clean, and durable surface with an improved appearance. It preserves and protects the surface. And covers porous materials of masonry work. A plaster coating creates a stronger and more durable wall finish and it contains thermal conductivity and has acoustics properties.