Wood sealants are specialized coatings designed to protect wooden surfaces by penetrating deeply into the wood fibers and sealing the pores. This process creates a barrier that prevents moisture infiltration, which is one of the main causes of warping, swelling, and decay in wood. Sealants are typically made from acrylics, polyurethanes, silicones, or natural waxes, and they can be applied with brushes, rollers, or spray equipment. They are available in clear, satin, or matte finishes, allowing the natural beauty of the wood grain to show through. Depending on the formulation, exterior-grade sealants may include UV inhibitors that protect the wood from fading and degradation due to prolonged sunlight exposure. Sealants enhance wood’s durability by resisting stains, mild chemicals, and household cleaners while maintaining flexibility to adapt to natural wood expansion and contraction. They generally dry within 4–12 hours and can be recoated for increased protection. Maintenance involves periodic reapplication, especially in outdoor applications such as decks and fences. Environmentally friendly low-VOC and water-based sealants are widely available, offering safer options for indoor use. By extending the life of furniture, flooring, cabinetry, and exterior woodwork, sealants serve as a fundamental protective layer in wood preservation.