You should clean and seal your natural stone surfaces because it protects the stone from staining, water damage, and weathering by creating a barrier that prevents liquids and dirt from penetrating the porous stone, thus preserving its appearance and extending its lifespan; essentially, sealing helps to maintain the natural beauty of your stone surfaces by shielding it against elements like moisture, UV rays, and even mold growth. 

Key reasons to clean and seal your stone surfaces

Stain resistance:

Flagstone is naturally porous, so sealing it prevents liquids like oil, food, and drinks from soaking into the stone and creating permanent stains. 

Water protection:

Sealing helps repel water, which can prevent cracks and spalling (chipping) caused by freezing and thawing cycles. 

Color preservation:

Sealing can help maintain the natural color of your stone surfaces by preventing discoloration from dirt and UV rays. 

Reduced maintenance:

Regular cleaning becomes easier when your stone surfaces are sealed, as dirt and debris can be more easily removed. 

Protection against mold and mildew:

A sealant can deter the growth of mold and mildew on your stone surfaces