A wood sealer is a protective coating applied to wooden surfaces to prevent moisture, dirt, and other contaminants from penetrating the wood. It helps to preserve the wood's natural beauty and extends its lifespan by reducing the risk of warping, cracking, and decay. Sealers can be used on various wood types, including furniture, decks, and outdoor structures. There are different types of wood sealers, such as oil-based, water-based, and polyurethane sealers. Each type has its own application method and drying time. Proper application of a wood sealer can enhance the appearance of the wood while providing essential protection against the elements.