Cuprinol Ultimate Garden Wood Preserver is a water-based, timber treatment for all your exterior rough-sawn wood, including sheds, fences, summerhouses and cabins. Formulated to offer UV protection, the added waxes and resins provide superb weather protection and deeply penetrate the wood to resist decay and blue stain. Lightly tinted in a range of colours it's an ideal product to add colour to your garden whilst protecting the wood. 5 year performance Preserves against rot, decay and blue stain UV Protection Available in a range of colours