Over time, untreated timber turns silvery grey in colour. This can be caused by several actions taking place including UV rays from the sun bleaching the colour out of the wood. Add in air pollutants and other biological actions taking place and your unfinished timber can end up looking grey and tired. Treatex Rejuvenator is a non-toxic, solvent free cleaning agent, based on natural ingredients including fatty acid extracted from Coconuts and Oxalic acid (found in Rhubarb leaves, Brassicas and Parsley). Treatex Rejuvenator gently lifts dirt and dead cells from the surface of the timber, restoring the colour back to its original state. It can be applied to both hardwood and softwood including decks, fences and garden furniture.Treatex.