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Osmo Wood Finish Exterior One Coat Only HS Plus

Please note: 'Osmo One Coat Only HS Plus' cannot be shipped to the greater Los Angeles area in any size due to restrictions. The 2.5L size cannot be shipped to the following States: CA, MN, WI, IL, MI, OH, PA, NY, VT, NH, ME, UT, AZ.


Because you have other things that you could be doing. Osmo One Coat Only is a semi-transparent, satin exterior and interior wood finish that colors and protects exterior wood with only a single coat. It won't crack, peel, or flake, and it's water repellant, UV-resistant, and moisture-regulating. Save time with this one-and-done exterior wood finish. 

The Exterior Finish That's One Coat Only

This transparent, satin wood finish is based on natural oils for wood in outdoor areas. Unlike urethane finishes, which seal the wood off completely, it allows the wood to “breathe” and reduces swelling and shrinkage. It's water-repellent, extremely weatherproof and UV stable. Will not crack, peel, flake or blister. Osmo One Coat Only HS Plus works because it has high solid content, offering high coverage in just one coat. Maintenance is also a breeze, because you don't have to sand the finish to apply touch-ups. The dry finish is safe for humans, animals and plants. It is biocide free. 

This versatile product is suitable for use for many exterior wood surfaces, including timber cladding, carports, fences, pergolas, gazebos, patio furniture, and more. For decking, we recommend the Osmo Decking Oil. 


Note: Transparent colors are influenced by the natural color of the wood. Light transparent color tones offer limited UV protection and we do not recommend them for surfaces exposed to strong sunlight.



Ensure that the wood surface to be treated is clean, dry (maximum moisture content 20%) and free from dust, dirt or any other surface contaminants.


  1. Old paints and varnishes must be fully removed with a suitable paint and varnish remover prior to application of Osmo One Coat Only
  2. Old microporous stains need only be cleaned or lightly sanded
  3. Remove any mold or algae growth
  4. For wood that has turned silver / grey due to weathering, pre-treat with Osmo Wood Reviver Gel
  5. Fill any holes or imperfections in the wood




Always do a test area before starting any project to check suitability and compatibility. Follow the manufacturer’s instructions on the tin at all times.


Osmo One Coat Only HS Plus should be brush or roller applied only. It is not suitable for spray application. Stir well before and during use for a consistent finish.


  1. Apply Osmo One Coat with an Osmo Brush or Osmo Microfiber Roller
  2. If using a brush, only dip the brush a little into the tin and apply very thinly along the wood grain
  3. Apply the product thoroughly and evenly, and allow to dry for 12 hours with good ventilation
  4. Remove any excess product immediately with a clean lint-free cloth


For additional protection, apply a coat of Osmo UV Protection Oil Extra over One Coat HS Plus when fully dry. This will give the surface a slightly satin appearance and improved durability of the finish. If possible apply to all sides of the wood.


CAUTION: cloths, steel wool, or other materials saturated with this product are combustible and may spontaneously catch on fire if improperly discarded. Immediately after use, place rags, steel wool or waste in a sealed water filled metal container.  See product information page attachment in “Technical tab” for more information. 




Regular Cleaning

Light marks and dirt can be removed by cleaning the affected surface with a mixture of water and Osmo Wash And Care.

Additional Information


Application Temp.+5°C to 35°C
Approx. Coverage26m²/L (280ft2/L) with one coat
Approx. Dry Time12hrs.
Number of Coats1 coat
Colours9211 White Spruce, 9212 White Poplar, 9221 Pine, 9232 Mahogany, 9234 Scandinavian Red, 9235 Red Cedar, 9236 Larch, 9241 Oak, 9242 Fir Green, 9261 Walnut, 9262 Teak, 9264 Rosewood, 9271 Ebony
Sizes2.5L, 750mL, Sample Sachet (5mL)


Data Sheets

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