All new decking both soft and hardwoods will naturally silver in about two years. If installed correctly decking should last twenty years plus without any treatment. However to keep the 'pre-silvered' colour of hardwood timber decking or change the colour of pine decking we recommend applying a deck oil that has a colour enhancer (stain). Also some hardwood decks can be returned to the natural timber colour by using a specialist decking treatment such as Cabots Deck Clean. Then, if treated every one or two years with deck oil/stain you can keep the decking near to the natural 'un-silvered' colour. All these products are readily available in DIY stores, mix the deck oil well and test an area first.