Answer: Cutek oils deeply diffuse into timber and provide long lasting protection from within. This means that the wood will continue to resist water and remain stable even after the surface has faded or silvered, which means your exterior timber will last much longer, even if it has faded or gone grey.
If you want to keep colour on the surface of your wood, then reapplication of Cutek oil with a color-tone will be required, and the time frame to reapply will vary depending on a number of factors. More frequent maintenance is required in fully exposed areas, or areas with heavy traffic. As an example, a fully exposed deck with heavy traffic will probably need cleaning and re-coating every six months, whereas rough-sawn shingles on a protected wall will retain their colour and stability for many years after the initial application.