Cuprinol Ultimate Wood Preserver has a superior formulation that works in three ways; UV filters give long lasting colours for up to 5 years, added waxes and resins provide advanced weather protection and active ingredients penetrate deep into the wood to protect against rot, decay and blue stain It can be used on all types of rough or planed wood such as sheds, fences and summerhouses, gates and arbours colour and protect rough sawn and smooth planed garden wood It penetrates deep into wood to protect against rot, decay and mould growth Special colourfast pigments give rich natural shades that