When used as a stand alone finish it blocks the greying process by UV-Protection factor 12 in comparison to untreated wood Natural Oil Woodstain Effect - Osmo Canada Store Prevents Wood Greying Osmo 420 Extra Clear Satin UV-Protection Oil 3L | Build & Plumb Osmo Oil Exterior Uv Protection Osmo 410 Clear Satin UV Protection Oil has been designed to protect and enhance the wood's natural colour whilst slowing the greying process by 12 times compared to untreated wood Does not crack, flake, peel or blister CHOOSE SIZE: Osmo UV Oil Clear 750ml, Osmo UV Oil Extra Clear Satin 2.5L, Osmo UV Oil Satin Matt 2.5L OSMO UV PROTECTION OIL (410) Satin clear finish for exterior finish with a variety of uses Natural oil based and microporous Does not crack, flake, peel or blister When used as a final finish after staining wood prolongs the renovation time significantly When used as a stand alone finish it blocks the greying process by UV-Protection factor 12 in comparison to untreated wood Water and dirt resistant, moisture regulating and reduces swelling and shrinkage of the wood Available in 0., 75 and 2., 5 litre drums 1 litre covers approx 16 sq., metres