Coating wooden components Perfect embellishment and permanent protection for wooden components
Wood "lives" and "works". Even when made into wooden components and wood-based materials, it still reacts – particularly in exterior areas – completely naturally to the impacts of wind and weather, such as UV radiation, extreme temperatures, and biological factors, such as fungal decay and insect attack. Appropriate products and know-how are essential when applying coating materials to wooden components to embellish and protect them permanently.
Product assistant
Do you need to coat non-dimensionally accurate, limited dimensionally accurate, or dimensionally accurate wooden components in exterior areas? Or wood and wood-based material in interior areas? Are you looking for a covering, glazing, or colorless wood coating? After the criteria have been selected, the product assistant guides you directly to the right product.
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Wood protection
Constructive wood protection: The most important thing is
No other material is as versatile as wood - but it also has a number of peculiarities to be contended with: As a natural material, wood is extremely challenging. Wood has to be protected from the sun, moisture, and temperature fluctuations. As early as the planning phase, it is important to ensure that wooden components are protected from moisture penetration. Rain and condensation must drain off without obstruction. Because constructive faults cannot be rectified afterwards, even by the best coating system.
- Adequate eaves: The eaves should be dimensioned such that direct weathering is avoided to the greatest possible extent. Wood components should not be used in the splash water zone!
- Protection of end-grain faces: Cut surfaces across the grain (end grain face) are particularly susceptible to moisture absorption and have a high rate of swelling. The end grain face should therefore be protected from direct weathering to the greatest possible extent.
- Drip edges: These serve to drain off the water as quickly as possible.
- Rounded edges: For dimensionally accurate wooden components – e.g. windows – all edges must be rounded to achieve a good edge protection with an adequate layer thickness.
- Avoid contact with the ground!
Chemical wood protection
Chemical wood protection should always be implemented selectively – i.e., only where required due to the type of wood used and the situation on site, and also only where its effect is actually needed: deep in the wood. The impregnation to be used must therefore have a good penetration properties. Brillux Wood Preservative Primer 250 is ideal for deeply penetrating into the pores of the wood, thus protecting non-lbearing timbers without ground contact in exterior areas as well as windows and exterior doors against blue stain fungus and rot. Its effectiveness was acknowledged in an EU-wide approval procedure for wood preservative (see DIN 68800-3 under "Standards and regulations").
Physical wood protection
Physical wood protection is used in addition to the constructive measures and chemical protection. In this context, suitable coatings are used, which, on the one hand, keep the impacts of weather away from the wood and, on the other hand, are used for surface design (see BFS Leaflet No. 18 under "Standards and regulations"). Flexible protection against algae and fungi In addition to soiling, microorganisms such as algae and fungi are increasingly becoming a problem for exterior surfaces. The unique Protect protection concept from Brillux provides flexible and extensive protection in all color shades and for all substrates – including wood.
Dimensional stability
The selection of the correct wood coating is based on the criterion of dimensional stability. This defines how much a wood component changes or is permitted to change its dimensions due to swelling and shrinkage. We differentiate between non-dimensionally accurate, limited dimensionally accurate, and dimensionally accurate wooden components, which all require specific coating build-ups.
Wood components are classed as dimensionally stable if their dimensions are only allowed to change to a very limited extent. Windows, exterior doors and window and door shutters that have been mortised and glued for dimensional stability are mentioned as examples in this context.
Wooden components with a limited range of allowed dimensional changes are considered to have limited dimensional stability. Examples include groove and tongue paneling, garden furniture, framework, roof soffits and ledges, as well as exterior doors, window and door shutters, if they are not already considered to be dimensionally stable.
Components that are non-dimensionally stable are those whose volume changes are not limited, e.g. exterior wooden siding mounted with an open joint, open lap siding on a slatted frame, overlapping wooden paneling, shingles, palisades, wooden grating or fences.
UV protection
For healthy wood: High-tech against UV radiation
The impact of shortwave UV radiation damages the most important components of wood: cellulose and lignin. The impact of the radiation on lignin is particularly drastic. Lignin is stored as a paste-like substance in the cell wall and ensures the stability and hardness of the wood. The high-energy UV radiation gradually breaks down the lignin.
In exterior areas: Permanent Protection Woodstain 580
Wood is a demanding building material, which is subjected to the highest levels of stress in exterior areas and therefore requires special protection. This is not just about the appearance, but above all permanently guaranteeing the function of the components. It is therefore essential to choose the correct coating. The material must
- withstand changing weather conditions
- guarantee long-term protection from UV radiation
- be resistant to embrittlement
- have optimal substrate adhesion
With the Permanent Protection Woodstain 580, Brillux has developed a wood coating that fulfills exactly these requirements – and even more than that. In addition to outstanding protection, it also provides ease of application.
In interior areas: Coating properties
High-energy UV radiation has a negative effect in both exterior and interior areas. The result is unattractive changes in the color shade that become visible, at the latest, when furniture is moved. With the innovative UV absorbers, Brillux has developed a technology that largely prevents wood from darkening or yellowing. In interior areas, the clear varnishes Lacryl-PU Wood Sealer 262 and 264 provided with UV absorber are ideal for use on previously untreated surfaces, because the original color shade is still retained there.
Brightening technique
Brillux practical tips for professionals
The brightening technique is used where visual harmonization between dark wood components and other surfaces is required – for example new windows or doors. The desired effect is achieved with a coordinated combination of covering prime coating and glazing finish.
The goal is to make a dark, glazed wood surface lighter. At the same time,the appearance of wood is also to be retained. This can only be achieved with the brightening technique.
The dark glazed substrate is covered in the specified color shade with Impredur Primer 835.
The intermediate and top coats with Permanent Protection Woodstain 580 is implemented in a slightly streaky manner.
The perfect result is achieved through the interplay of the covering prime coating and glazing top coat.
Isolation of wood constituents
The most important thing is
The situation: White paneling has just been painted, and it suddenly has a brownish shimmer or exhibits ugly yellow flecks. The cause: Wood is a demanding material made up largely of organic components, but also contains certain quantities of wood constituents. These substances are water-soluble and can be transported from one layer to another and eventually reach the surface when water-based coating materials are used. The solution: Whereas, with conventional water-based prime coats, a large fraction of the wood constituents are transported to the coating surface, Isoprimer 243 or Hydro-PU-XSpray Isoprimer 2243 effectively prevents such penetration. The recipe for success lies in the cationic isolating effect. The special formula and a slightly acidic pH value achieve an outstanding barrier effect. Wood constituents therefore cannot penetrate the coating film.
