Silicate mineral paint

Silicate mineral paints or silicate emulsion paints are mineral based coatings formulated with potassium silicate or sodium silicate, otherwise known as waterglass as the binder, combined with inorganic, alkaline-resistant pigments. Traditionally, they have been fully inorganic (containing no organic solvents) and are non-offgassing. Modern silicate emulsion paints have small amounts of petroleum distillates, but far less than synthetic oil or latex paints. Mineral paints petrify, by binding to any silicates within the substrate, forming a micro-crystalline structure and a breathable finish. They are more of a stain, that becomes integral to the substrate, rather than a coating. They are alkaline and therefore inhibit microbial growth, and reduce carbonation of cementitious materials.

Various non-toxic concrete stains and limestone restoration products are waterglass based. Mineral paints are also used as a non-toxic wood preservative.

The difference between the use of sodium silicate and potassium silicate as a binder is mainly geographic. The western hemisphere mainly produces sodium silicate, whereas Europe produces potassium silicate.

Possible substrates

• masonry
• stone
• concrete
• lime plasters
• earthen plasters

Applications

• environmentally friendly, non-toxic applications
• high durability, especially on masonry products, and lightfast
• mineral paints with high vapor permeability
• acid rain resistance
• antifungal properties
• reduces carbonation of cement-based materials

See also

• Keimfarben - a manufacturer of silicate paints
• Lime paint