Lime Plaster
This information reflects our best understanding of product composition in 2023.
Lime based plasters are used in both interior and exterior applications as finishes over laths, drywall, masonry, or masonry plaster bases. Plasters based on non-hydraulic limes cure slowly by carbonation and result in a softer, more flexible and...
Lime based plasters are used in both interior and exterior applications as finishes over laths, drywall, masonry, or masonry plaster bases. Plasters based on non-hydraulic limes cure slowly by carbonation and result in a softer, more flexible and breathable surface compare to other plaster types. Plasters containing hydraulic limes cure more quickly and result in harder and less flexible surfaces. Products may contain either or both types. At their most basic, lime based plasters are composed of lime, an aggregate such as sand, and water. Products may contain a range of other additives such as additional aggregates, pozzolans, synthetic polymers, and pigments. Lime plasters are typically supplied as powders that are mixed on site with water prior to application, however some products are sold as a pre-mixed paste. Plasters are typically applied in multiple coats. Number of coats, surface preparation, and thickness vary by substrate, product, and installer preference. This CP covers a single product to be applied in multiple coats comprised of non-hydraulic lime, sand, and ground marble supplied as a powder. Products may be sold unpigmented or contain mineral or metal oxide pigments, which are included in the all contents.