What types of sealers protect outdoor stone against constant sunlight?
Most quality sealants provide plenty of protection from UV rays. Sub-surface sealers (not topical sealers) are best for outdoor installations. Sunlight, however, isn’t really a big problem for natural stone not anywhere as much as water, dirt, grime and grease. Look at any large office building that has a natural stone façade these stone surfaces are in direct sunlight all day long and their worst enemy is water and dirt, not sunshine. Being able to survive constant sunlight is one of the best things about having natural stone!
