Up to the present time, this has always been done by azures or saturators. Some wood sorts (e.g. douglas and larch) cannot be given durable protection with azures and some others (e.g. cedar) cannot be protected at all. Then again, saturators have the disadvantage that they have to be renewed regularly. Blanchon has solved these problems by the introduction of a new finish systems. Blanchon presents a colourless protective system against the effects of sunlight on wood. An important added value of this system is that the original colour of the wood is preserved. Whereas protection against UV light is traditionally related to the addition of dyes, this system is colourless. These systems form a new family of finishes: they can be used on all sorts of wood, they give the wood a long lifespan, and they are easy to maintain.