The fast and easy way to colour and protect your garden wood. With the Cuprinol Fence Sprayer and Sprayable Cuprinol treatments you can treat your garden wood in a fraction of the time it would normally take with a brush. How much do you need? Refer to back of pack of the relevant Cuprinol sprayable product. Coverage quoted with 2 coats. Coverage can vary depending on application method and the condition and nature of the surface.