Varathane Crystal Clear Polyurethane is designed to provide excellent protection for all your wood projects. Varathane Crystal Clear Polyurethane is formulated to provide excellent protection from scratches and stains. It is ideal for interior projects such as interior stained, bare or painted wood surfaces, including furniture, doors, windows, cabinets and trim. It is crystal clear, odorless and provides for easy water clean-up. It is not recommended for linoleum, vinyl or glazed tiles and metal.