This water-based wood effect works with wood's tannins to produce a naturally aged look in minutes. Every piece of wood reacts differently, so every project is unique. For a rustic look that will continue to patina with time - topcoat not recommended. For increased durability and protection while maintaining a rustic look, use Polycrylic note: final appearance will be darker. Not recommended for large surfaces like floors due to fast dry time. Use Minwax Wood Finish penetrating oil stain for large projects.