Cuprinol Wood Preserver is a water-based, colourless, general-purpose preserver for interior* or exterior use. It gives deep penetrating protection to sound wood against decay, mould and blue-staining fungi. Before application remove excessive dirt and soiling, large areas of algae, lichen or fungi using an appropriate fungicidal wash or cleaner designed for the job. Wood that has been wood-stained, painted or vanished should be stripped back to bare wood and treated as bare wood. Do not use this product to treat wood destined for in ground contact use. Ensure that timber used in ground contact has been pre-treated especially for such use. *Occasionally wet or interior wood with risk of condensation. Specification: Coverage: 1L covers up to 5m with 2 coats, 5L covers up to 25m with 2 coatsDrying Time: 16 hours