Earthborn’s Silicate Masonry Paint is probably the most durable paint available for exterior masonry. When used as a full system with Silicate Primer, it makes a chemical bond with the surface by physically ‘knitting’ into the substrate. Properties depending on location and weather are known to have Silicate Masonry Paint lasting on the property for 50-60 years.
As with all paints, proper preparation is essential. For information about application of the system, see here.