Stone is a high-end building material that can substantially add to the cost of a project. With the help of chemical sealers, the durability of the stone is ensured, and the beauty of the work is preserved. Today, architects can specify a larger variety of stones, knowing that the stones that were avoided in the past due to their brittle or hard-to-clean nature can be strengthened and made stain-resistant with the help of chemical sealers. Sealers invisibly protect stone, forming a barrier to repel stains and water damage.