Pool patios are typically made from poured concrete, concrete blocks, or pavers. Because the patio surrounds the pool, it requires a sealer that helps to: 1. Create a non-slip surface. 2. Prevent pool water from being absorbed into the concrete. 3. Prevent the patio from staining (exposure to outdoor elements). 4. Strengthen the patio to prevent it from cracking and spalling. 5. Reduce the growth of mold or mildew.