Yes, plaster can contain silica, particularly if it is made from materials like gypsum or Portland cement, which can have silica as a component. Silica is often present in the form of sand, which may be added to certain types of plaster mixtures to improve strength and durability. Additionally, some types of plaster, such as those used for creating textured finishes, may incorporate silica sand for added texture.
However, the silica content can vary depending on the specific formulation and type of plaster being used. Always refer to the manufacturer's specifications or safety data sheets for detailed information regarding the composition of a specific plaster product.