Varnishes are transparent or semi-transparent wood coatings that enhance the natural beauty of wood while providing a protective barrier against moisture, scratches, and environmental damage. Formulated from natural or synthetic resins, oils, and solvents, varnishes create a hard, durable film that bonds well to wood surfaces. Available in finishes ranging from high gloss to matte, varnishes not only highlight the grain and texture of wood but also safeguard it from daily wear and tear. Modern varnishes, especially polyurethane-based variants, offer enhanced resistance to water, heat, and chemicals, making them suitable for both indoor and outdoor applications. With drying times ranging from 6 to 24 hours, depending on type and environmental conditions, varnishes require careful application by brush, roller, or spray. Regular maintenance such as sanding and recoating extends their protective life and ensures long-lasting beauty. Exterior-grade varnishes often include UV filters to prevent fading and cracking caused by sunlight exposure. With a coverage of 10–12 m² per liter, they are efficient in providing protection with minimal product usage. Whether used on furniture, flooring, doors, or decorative wooden structures, varnishes combine functionality with aesthetics, preserving wood’s natural charm while extending its durability.