The mineral surface is highly light refractive which helps to keep building facades cooler, even in extreme climates—adding to the lifespan of concrete and masonry.



Mineral silicate paints and stains develop a micro-porous matrix of millions of shallow pores that help to refract and diffuse U.V. light and solar radiation. Temperature fluctuations can damage concrete prematurely. The mineral pigments used in Keim’s Mineral paints and stains reduce heat absorption of the surface, reducing thermal stresses.

And mineral surfaces have a unique beauty and luminescent quality, especially in low light environments. Light refraction makes surfaces appear brighter which is especially helpful on concrete installations where there is low light such as tunnels, below-grade transit stations and parking garages.


Solar radiation is refracted and the façade remains cooler especially when dark or vibrant colors are selected.





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