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420P

Osmo 420 UV Protection Oil Extra Clear Satin has been designed to protect and enhance the wood's natural colour whilst slowing the greying process by 12 times compared to untreated wood. Osmo 420 Extra is ideal for vertical joinery such as windows, doors, cladding etc, the natural oil based microporous finish does not crack, flake, peel or blister.

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Cost

£79.56

£75.58 Inc VAT

£62.99 Excl VAT

This works out at: £25.19 per litre
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1 coat(s):

2 coat(s):

These figures are designed to give you an approximate guide only. Coverage can vary significantly depending on the condition and porosity of the substrate.

Description

Accessories

Features

Data Sheets

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FAQ

Osmo 420 Extra Clear Satin UV Protection oils is a transparent oil-based protective finish for exterior wood. The 420 Extra version contains a biocide to prevent the growth of algae, mildew and fungal attack. If you want the version without a biocide please go to Osmo 410 UV Protection Oil. The microporous surface allows the wood to breathe whilst reducing swelling and shrinkage.

Please note that Osmo Extra UV Protection Oils are also available with a light pigment, which will further improve UV protection; Osmo UV Protection Oil Tints in Spruce (424), Oak (425), Larch (426), Douglas Fir (427), Cedar (428) and Natural (429), please see the UV Protection Oil Tints listing for more details. Please note that the pigmented versions will always offer significantly better UV protection than the clear finishes. Osmo UV protection can also be used as top coat on already coloured treated wood which have had a coat of Osmo Natural Oil Wood Stain, Osmo Wood/Decking OilOsmo Country Colour or HS Plus, in this situation the Osmo UV-Protection Oil will extend the intervals between renovations significantly.

As a self-priming finish, Osmo 420 prevents the greying process on vertical surfaces with a UV protection factor 12 in comparison to untreated wood when two coats are applied. The Osmo 420 contains active ingredients that prevent mould, algae and fungal attack. When applying a maintenance coat simply apply without sanding which makes it an easy and seamless application.

Key Product Features and Benefits:

  • Microporous breathable finish that doesn't crack, flake, peel or blister
  • Easy to maintain with no sanding back required before further applications
  • Extremely water and dirt resistant
  • Significantly reduces wood swelling and shrinkage
  • Enhances the natural character of the wood
  • 420 contains biocides to protect against algae, mildew and fungal attack
  • A UV Protection factor of 12 compared to untreated timber (with recommended two coats)

Suitable Applications:

Osmo UV-Protection Oil 420 Extra is ideal for all vertical exterior wood surfaces: doors, windows, window shutters (dimensionally stable elements), carports, timber cladding, balconies, fences, pergolas, and summer houses (dimensionally unstable elements). It is also suitable for bamboo poles (e.g. in screens). Nb.UV protection oil should not be applied directly to horizontal surfaces or surfaces with less than a 15° slope otherwise water will not run off and will eventually permeate the coating. We would recommend using Osmo Natural Oil Woodstain for these applications.

Key Ingredients:

Osmo UV Protection Oils are based on natural plant oils (sunflower oil, soya oil, thistle oil and linseed oil), siccatives (drying agents) and additives, 420 biocidal active ingredient: Propicona- zole. Dearomatized white spirit (benzene-free). This product fulfils EU regulations (2004/42/EC) according to the VOC content of max. 400 g/l (Cat. A/e (2010)). Detailed declaration of ingredients available upon request from Osmo.

Technical Information:

Specific gravity: 0.9-1.0 g/cm³
Viscosity: >50s DIN EN ISO 2431/3 mm, viscid
Odour: faint/mild, odourless after drying
Flash point: >60 °C acc. DIN EN ISO 2719
Ideal Application Temperature: +10°C - 35°C

Method of Storage:

Osmo UV Protection 420 oil will last up to 5 years or longer if the can is kept dry, away from direct heat and sunlight and kept tightly closed. If thickened by frost, store for 24-36 hours at room temperature before use.

How to Prepare the Surface:

When applying Osmo 420 UV Protection Oil, the wood surface must be clean, dry and frost-free (moisture content max. 20%), avoid applying to surfaces above 35°C or below 10°C. Osmo 420 UV Protection Oil is ready to use, please do not thin. Stir well before use. Clean old microporous stains thoroughly. Any old paints and lacquers must be completely removed. It is always recommended to wear a dust mask during sanding. To help with absorption and ease of application do not sand surfaces finer than P120.

Fresh wood containing extractives and especially exotic hard wood needs to weather off (for approximately 6 - 8 weeks) after installation, pressure treated timber should be allowed to weather for a minimum of 10-12 weeks minimum. This allows the wood to becomes absorbent and the wood finish adheres optimally. A base coat with a coloured finish is always recommended, e.g. Natural Oil Woodstain or Wood/Decking Oil to give the best UV protection.

For renovations, clean old microporous wood finishes thoroughly. Clean and refresh already greyed or weathered wood at the same time with Osmo Wood Reviver Power Gel. The finished surface is, among other things, always influenced by the wood‘s natural characteristics. Therefore, a trial application is always required, especially for unfamiliar surfaces.

If additional protection against blue stain, rot and insects is desired, pre-treat the wood if possible on all sides with Osmo WR Base Coat* 4001. 
*Use biocides safely. Always read label and product information before use.

How to Apply:

Apply the Osmo 420 UV Protection oil thinly along the wood grain with a suitable Brush or Osmo Microfibre Roller and spread well. Allow to dry for approximately 12 hours with good ventilation before applying the second coat. Please take careful note of minimum application temperatures and wood moisture content.

Cleaning Tools & Equipment:

We recommend using Osmo Brush Cleaner (free of aromatic compounds) or alternatively white spirit.

Drying Time:

Approximately 12 hours (normal climatic conditions, 23°C/50 % rel. humidity). Lower temperatures and/or higher air humidity can increase the drying time significantly. Allow for good ventilation while drying. The ideal application temperature is 10°C - 35°C. Do not apply at temperatures below 5°C or when the temperature will drop below 5°C whilst it is drying.

Coverage area:

1 litre covers approximately 18 m² with one coat but please note that coverage depends significantly on the character of the wood. All information refers to smooth and planed/cut surfaces. Other surfaces may lead to significantly reduced coverage.

Please Take Note:

Oils and waxes will always change the natural tone of wood (similar to the appearance of wet timber), so for this reason we always recommend doing a test area before the main application. Depending on the degree of weathering and how exposed the wood is, apply one coat of Osmo UV-Protection-Oil 420 Extra to the cleaned and intact finish after approx. 3 - 4 years.

For areas which are highly exposed to weather and UV, such as weatherboard, post caps or window sills, please expect substantially shorter intervals between renovations. Vertical elements mounted onto horizontal wood should have at least a 15 degree angle. Sharp edges must be rounded (radius > 2 mm).If the greying process has already begun, refresh the surface with Osmo Wood Reviver Power Gel and re-apply 2 coats of Osmo UV-Protection-Oil. To achieve the UV protection factor 12, it is necessary to apply 2 coats of UV-Protection-Oil Extra. With only one coat on untreated wood, the life of the finish is significantly shorter.Due to the high oil content, clear UV-Protection-Oil Extra has a light yellowing effect when used as a finish on white substrates. Therefore as a top coat on white finished areas, we recommend Natural Oil Woodstain 900 White.

Osmo UV Protection-Oil 420 Extra contains biocides and therefore is only to be used on exterior areas. The added active ingredients delay or minimize the risk of algae and fungal attack. For effective protection, two coats are to be carried out. In accordance with the latest technical research, a permanent protection against algae and fungal attack cannot be provided.

Warning:

Keep out of the reach of children. Do not get in eyes, on skin, or on clothing. Contains 2-butanonoxime and propiconazole. May produce an allergic reaction. If medical advice is needed, have product container or label at hand. Use only outdoors or in a well-ventilated area. Harmful to aquatic life with long lasting effects. Avoid release to the environment. Dispose of contents/ container in accordance with chemical waste disposal regulations (AVV 08 01 11). Warning: Wash out any cloth used with this product immediately after use or store in an airtight container (danger of self-ignition). The dried finish is classified as B2 (normal flammability) according to DIN 4102 regulations. Safety data sheet upon request.

Method of Disposal:

With Osmo 420 dispose of leftover product and completely emptied packaging according to local official guidelines (waste code number 08 01 11). Only completely emptied cans can be recycled.

Surface Finish:

  • Osmo 420 Extra (with Biocide) - Clear Satin

Container Sizes:

5ml Sachet(recommended),125ml Tester Pot, 750ml, 2.5 Litre, 10 Litres (420 Only). The above mentioned information is provided to the best of our knowledge however without any liability.

Area of Use - Exterior only.

Anti-Slip - No

Suitable for Worktops & Tables - No

Suitable for Doors - Yes

Suitable for Doors, Windows & Joinery - Yes

Suitable for Floors - No

Suitable for Decking - No

Suitable for Cladding, Fencing & Garden Buildings - Yes

Finish - Satin

  • What happens if I apply Osmo 420 UV Protection Oil at below 5°C or the temperature drops below 5°C shortly after I apply it?

    Like all oils and waxes Osmo oils will thicken at low temperatures so will not be absorbed in to the wood, the white spirit will then evaporate off and you will be left with a sticky coating on the surface of the wood.

    We recommend where possible not applying Osmo wood oils below 10°C or when the temperature will fall below 5°C within 8 hours of application.

    It's always a good idea to store your Osmo products at room temperature for at least 24°C hours before use.

  • How long do I need to leave my wood before applying Osmo UV protection oil?

    Recommended:

    • Oak
    • Beech
    • Ash
    • Alder
    • Birch
    • Douglas Fir, an application of WR Base Coat 4001 is recommended before use.
    • Pine, an application of WR Base Coat 4001 is recommended before use.
    • Spruce, an application of WR Base Coat 4001 is recommended before use.


    A Weathering period is recommended before application:

    • Cedar new or sanded, requires at least approx - 12 weeks exposure to the exterior elements before application.
    • Iroko new or sanded, requires at least approx - 12 weeks exposure to the exterior elements before application.
    • Mahogany new or sanded, requires at least approx - 12 weeks exposure to the exterior elements before application.
    • Teak new or sanded, requires at least approx - 12 weeks exposure to the exterior elements before application.
    • Walnut new or sanded, requires at least approx - 12 weeks exposure to the exterior elements before application.
    • Ipe new or sanded, requires at least approx - 12 weeks exposure to the exterior elements before application.
    • Merbau new or sanded, requires at least approx - 12 weeks exposure to the exterior elements before application.
    • Wenge new or sanded, requires at least approx - 12 weeks exposure to the exterior elements before application.
    • Rosewood new or sanded, requires at least approx - 12 weeks exposure to the exterior elements before application.
    • Sycamore new or sanded, requires at least approx - 12 weeks exposure to the exterior elements before application.
    • Sapele new or sanded, requires at least approx - 3-4 weeks exposure to the exterior elements before application.
    • Larch new or sanded, requires at least approx - 2 weeks exposure to the exterior elements before application.

    After the weathering period, it is generally recommended to clean the surface before application, always trial apply.

    Not Recommended for use with UV Protection Oil:

    • Green Oak moisture content is often above the maximum 20% recommended.
    • Idigbo contains yellow dyes which leaches when the wood becomes wet and stains when in contact within iron.
    • Other woods treated with a varnish, lacquer or other surface coatings must be completely sanded before use.

    For all other wood species, always trial apply. If unsure always do a test area before application.

  • What is the difference between Osmo UV Protection Oil 410 and UV Protection Oil Extra 420?

    These products are basically the same clear product but the 420 Extra contains a biocide to help protect against algae, mildew and fungal attack.

  • What happens if I apply Osmo UV Protection Oils at below 5°C or the temperature drops below 5°C shortly after I apply it?

    Like all oils and waxes Osmo oils will thicken at low temperatures so will not be absorbed in to the wood, the white spirit will then evaporate off and you will be left with a sticky coating on the surface of the wood.

    We recommend where possible not applying Osmo wood oils below 10°C or when the temperature will fall below 5°C within 8 hours of application. It is always a good idea to store your Osmo products at room temperature for at least 24°C hours before use.

Product Data Sheet

The Products data sheet for Osmo 420 UV Protection Oil Extra Satin

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Product Data Sheet

The Products data sheet for Osmo 410 UV Protection Oil Satin

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Health & Safety Data Sheet

The health and safety data sheet for data sheet for Osmo 410 UV Protection Oil Satin & 420 UV Protection Oil Extra

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