Potassium silicate paints:



Approved as an Eco construction material in Europe with optimum breathability 90% – 95%, prohibits mold forming bacteria, 0% – 1.85% VOC (<30g/lt).

Potassium Silicate Mineral Paint was invented in the Middle Ages and is derived from a type of rock that consists of sodium silicate, which forms 90% of the earth’s crust. It is considered inorganic (contains no VOC). Potassium Silicate reacts with mineral surfaces by reacting to carbon dioxide in the air, so with stucco, brick, plaster, stone, which naturally contain calcium carbonate, bonds with the surface material as a permanent stain. Using colored tints, this paint, unlike Antica Calce or Marmorino, can achieve very dark colors. This Mineral Paint is extremely resistant naturally to UV rays, (using the approved color chart provided by San Marco) as it integrates itself chemically with mineral surfaces resists sun damage and discoloration for decades. Also not subject to damage by acid solutions, this paint is extremely resilient to the harshest environmental conditions.

“Essentially, mineral paints petrify, by binding to any silicates within the substrate, forming a micro-crystalline structure and a breathable finish. Being more of a stain, they become integral to the substrate rather than a coating. Since they are alkaline and therefore inhibit micro biotic growth, they also reduce efforescence of cementitious materials.”

Application for modern uses such as sheetrock require a mineral primer paint to be applied to sheetrock to create the carbonization reaction needed to “petrify”, andj create a durable, somewhat washable, evenly tinted, opaque paint. Unlike Marmorino or Antica Calce, Potassium Silicate paints only slightly mottle or form chromatic variables. They can be diluted in the 2nd coat to create an antique patina but without a lime paint or plaster look and feel.

Potassium Silicate mineral paints can be applied by sprayer, roller, or brush. For a true classic finish, it is recommended to hand brush the final coat. In addition, they can be applied on top of Lime Wash, Marmorino, and likewise can be covered with Lime Wash or Marmorino, as these are all mineral paints that carbonize with a mineral surface to form a bond. Potassium Silicate paints have similar color effects of Latex paints in terms of evenness and flat colors. Applications on previously painted surfaces require the application of a unique mineral primer that can be applied over latex or oil based painted surfaces.

Potassium Silicate mineral paint is a natural product, contains no chemicals, is non toxic, approved for eco-construction, highly breathable, and permeable. VOC content is a maximum <30g/lt, and when mixed according to manufacturers recommendations contains 0% – 1.85% VOC. Potassium Silicate paint preserves against formation of mold forming bacteria.

Material Composition

Potassium Silicate in a water base solution. Paint color is created by the use of concentrated natural earth minerals.

Color Choices

A brochure can be supplied with your paint samples to give you an indication of historical colors used with this product. A paint color fan can be provided to offer the maximum ranges of colors that can be in the range of white to very dark colors.


Color tints concentrates offer the possibility to adjust color ranges to suit your needs. Use very small quantities of concentrate to adjust color.

Historical Applications

Italian Silicate Paints were traditionally applied in 2 coats to provide a permanent color that can endure for up to hundreds of years. Color will not diminish with effects of sun, wind, and rain, as rapidly as occurs with lime based materials exposed to environmental conditions.

Antique Effects for Stucco and Brick

Italian Silicate Paints can be diluted to very small percentages, as little as 1/ 9 parts to create a hint of colour on stuccos and brick, whether on pre coloured stucco, or over full concentration of lime washed stucco to create an effect of a coloured wash that appears to be centuries old.

Ezra PucciPotassium silicate paints: