When the natural oils of Pro-Tek-Tor penetrate the wood, they take the colour pigments with them. Applying the clear topcoat over the initial tinted layers protects the wood's colour and the wood itself. As the clear coat is regularly maintained, the tinted layers are protected from colour fading, tannin stains and water stains. The clear coat has no pigment in it, so the appearance of the wood never grows darker.