Osmo UV-Protection Oil 420 Clear Satin with film protection, has been developed to maintain the wood's natural colour and slow the greying process by (UV factor) 12 times in comparison to untreated wood this avoids wood naturally greying into a patina colour over time. UV-Protection is ideal for windows, doors, cladding, fencing and other vertically structured joinery (not recommended on flat surfaces such as decking). Natural oil-based and micro porous finish does not crack, flake, peel or blister. Contains biocides to protect against mould, algae and fungal attack. Water and dirt resistant, moisture regulating and reduces wood swelling and shrinkage. Coverage: Approx. 18m²/L with one coat, 2 coats required, 12 hours drying application temperature +5°C to +35°C.