Powerful cleaning agent for the refreshing and cleaning of weathered exterior wood. The high energy UV rays from the sun destory the lignin in wood: It greys over time. Osmo Wood Reviver Power Gel has been specially developed to restore the wood back to original colour and character. Easy to apply with a brush, even on vertical structures thanks to the non-drip formula. The deep penetrating effect of the gel is most effective on untreated surfaces with results showing within just 30 minutes!