Made using solid, high-quality, FSC-certified teak the BK12 Sofa is durable and weather resilient. The natural oils in teak wood also protect it from rot and insects. Untreated teak (pale light brown in colour) will change to a silver-grey over time. Whilst this is normal if you want to keep more of the original colour you can oil it. Untreated teak is also prone to discolouring when wet, for example, ring marks from drinks. If it's the oiled teak version, be sure to re-oil before the wood starts to look dry and pale.