Editing Plaster (section)

===Heat-resistant plaster===
Heat-resistant plaster is a building material used for coating walls and chimney breasts and for use as a fire barrier in ceilings. Its purpose is to replace conventional gypsum plasters in cases where the temperature can get too high for gypsum plaster to stay on the wall or ceiling.

An example of a heat-resistant plaster composition is a mixture of [[Portland cement]], gypsum, lime, exfoliated insulating aggregate ([[perlite]] and [[vermiculite]] or [[mica]]), [[Phosphorite|phosphate shale]], and small amounts of adhesive binder (such as [[Gum karaya]]), and a detergent agent (such as [[Alkylbenzene sulfonates|sodium dodecylbenzene sulfonate]]).<ref name=heat>{{cite web|url=https://patents.google.com/patent/US3502490A/en |title=Heat and fire-resistant plaster compositions |publisher=Google Patents |access-date=9 November 2022 }}</ref>