No. You may choose to seal your stones to add to the beauty of your pavers. Some benefits are color enhancement, joint sand stabilization and stain resistance. When applied, the sealers soak into the pavers and joints. The sealer in the joints helps keep the joint sand in place and reduces weeds and ants. Sealers are essential for areas around swimming pools. However, you may choose not to do this. Remember, sealing the pavers is not permanent and should be reapplied every two years depending on foot traffic. Be sure to follow the instructions as printed on the sealer container for best results.