Osmo UV-Protection-Oil Extra is a satin-matt, clear finish for exterior. It is based on natural oils, is microporous, and does not crack, flake, peel or blister. When used as a final finish after staining wood, Osmo UV-Protection-Oil Extra prolongs the renovation time significantly. As a stand alone finish, with two coats, it prolongs the greying process on vertical surfaces by UV-Protection factor 12 in comparison to untreated wood. The finish contains active ingredients which protect it from mould, algae and fungal attack. Easy to renew, no sanding or primer necessary. Easy to apply, will not dry during application. Coverage 1 l = approx. 16 m² (1 coat smooth wood) 1 l = approx. 12 m² ( 2 coats smooth wood) For all vertical exterior woods (dimensionally and non-dimensionally stable): doors, windows and windowsills, carports, timber cladding, balcony, screens & fences, pergolas, garden houses and furniture. It is also suitable for bamboo. 1 coat = final finish 2 coats = complete finish Stripped and rough sawn wood need more material because of their surface structure. Wood surface must be clean, dry and frost-free (maximum moisture content 20%). Osmo UV-Protection-Oil is ready to use, please do no thin, stir well before use. Clean old open-porous finishes thoroughly. Remove old varnishes. Drying time: approx. 12 hours (normal climatic conditions, 23°C /50%, normal humidity). Lower temperatures and/or high humidity can increase the drying time.