Osmo - One Coat Only - Exterior Wood Finish
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Product information
What to know before ordering.
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Osmo One Coat Only HS Plus colors and protects exterior wood in a single thin coat. It keeps the grain visible and is suited to siding, fences, pergolas, balconies, garden furniture and other vertical or non-walking surfaces. It is not a decking finish.
At a glance
- Coverage: Approximately 280 sq ft per liter
- Coats: 1 thin coat
- Drying time: Approximately 12 hours
- Application temperature: 41–95°F
- Apply with: Osmo exterior brush
- Finish: Semi-transparent satin
- Use: Exterior vertical and non-walking wood; not recommended for decking
How to apply
Prepare clean, dry, absorbent bare wood and stir the finish thoroughly. Apply one thin, even coat in the direction of the grain. Smooth mistakes or heavy areas while the finish is still wet; Osmo's current brochure gives a correction window of about 15 minutes. Let it dry for approximately 12 hours with good ventilation.
Where practical, coat all sides of the wood before installation. Windows and other highly exposed vertical surfaces may receive a compatible UV-Protection Oil Extra topcoat after One Coat Only has fully dried.
Maintenance
Clean the wood and apply another thin coat before the existing finish wears through or the surface turns gray. An intact, compatible oil finish normally does not need to be stripped first.
Good to know
Transparent colors change with the underlying wood species and natural tone. Test on the prepared project wood before committing to a color.
Coverage by container
- 0.125 L (125 mL) can: Approx. 35 sq ft
- 0.75 L can: Approx. 210 sq ft
- 2.5 L can: Approx. 700 sq ft where listed