It is used as a finish to help protect wood. It is used on wood furniture, boat decks, flooring wood, concrete floors, stone, bamboo, brick, cabinetry, musical instruments and wood toys. As an ideal protective finish that protects your furniture and woodwork from moisture. Tung oil hardens upon exposure to the air and provides a transparent, wet look finish. Tung oil is waterproof and protects wood furniture from cracking.