Dry Treat Premium Porcelain & Quartz Sealer penetrates deeper than other sealants, forming a permanent chemical bond with the particles of the stone. This patio sealer is ideal for helping to protect your paving against oil and water-based stains and making cleaning easier. Also effective against efflorescence, it carries a 10-year guarantee when applied by an accredited technician. Before buying, we recommend that all customers read our Product Guide.