Typologies of wood coatings

PRODUCTS FOR EXTERIOR USE

Hydroplus water-based varnishes, formulated to reduce the absorption of moisture and the sun’s radiation, deliver advantages in terms of outdoor resistance and reduced solvent emissions. 

Hydroplus thixotropic topcoats, transparent and pigmented, are non-blocking and offer good elasticity, good vertical hold, excellent flow and good resistance to settling within the can. 

In order to ensure good outdoor resistance, Hydroplus-series products have been formulated with an optimal dose of UV absorbers, with the addition of free-radical scavengers. While the former reduces wood yellowing and the lignin destruction, the latter increases durability of the outdoor exposure. They reduce the issues of chalking and loss of gloss, in addition to boosting the effectiveness of the UV absorbers.

Synthetic products for woodwork exposed to the elements are normally made with long-oil alkyd resins. These products feature excellent application conditions, frost resistance, initial gloss, non-blocking, chemical resistance, reduced grain raising, suitable for application to all species of wood, quality price.

ACID CURED

Two-pack products with a good quality to price ratio mainly used in the interior furniture sector.

POLYURETHANES

Polyurethane varnishes are two-pack products: one base part and one hardener. They are designed to be mixed in given amounts immediately prior to use and that cure by means of chemical reaction. 

Polyurethane basecoat and topcoat products offer exceptional elasticity, quick drying properties, good adhesion properties and UV stability. They are particularly versatile. Products can be applied with a whole range of different coating systems: spray gun, curtain coating, airless, electrostatic and automatic systems. Using polyurethane varnishes gives woodwork a special level of topcoat that cannot be rivalled by single-pack varnishes in terms of surface hardness, chemical resistance and mechanical strength.

The extensive range of Sayerlack polyurethane basecoat and topcoats cater to all manner of furniture coating needs with excellent aesthetic results, mechanical strength, chemical resistance, quick drying properties and extremely short working times.

Varnishes from the polyurethane series are advanced products that are suitable for finishing furniture on an industrial scale and are the products most commonly used for: 

• coating chairs
• frames
• cabinet doors
• joinery
• wood flooring
• furniture in general

THINNERS

To adjust the coating’s viscosity to the right level for application.

UV CURED

Generally ready-to-use acrylic varnishes for industrial use, water- or solvent-based. The main advantages in using UV-dried varnishes are:

• high production speeds
• space saving in the manufacturing area
• coatings with very long or unlimited pot life
• low or zero solvent emissions into the air
• coated items that are ready to pack at the end of the production process.

Light is an electromagnetic wave. It’s just one component of the full range of radiation that goes from radio waves to gamma radiation, on the electromagnetic spectrum. Within the electromagnetic spectrum, only a very small portion belongs to the visible spectrum and another to the ultraviolet spectrum. 

The portion of radiation involved in the polymerization of varnishes is within this ultraviolet spectrum. 

Ultraviolet is the name given to a range of the spectrum of electromagnetic radiation with wavelengths between 100 and 400 nm, sitting between the visible spectrum and X-rays. Some substances actually absorb a great amount of UV, emitting other longer wavelength radiation, generally in the visible range. In the curing of varnishes, UV radiation is absorbed by special substances called photo initiators. They absorb UV ray energy, triggering a chain reaction within the varnish and allowing for a very fast polymerization process.

NITROCELLULOSE

These products form a film simply through the evaporation of the solvents. Nitrocellulose basecoatsare used as fillers, while nitrocellulose topcoats are used when a specific look is required. 

Topcoats can be divided into matt, low sheen, gloss and high gloss. They feature quick drying properties, surface hardness, workability, ease of application, excellent bonding and an attractive and decorative look, in addition to an exceptionally smooth film. 

Simple thinning is all that’s required for effortless application on both open-pore and closed-pore coating system, using a whole host of different application systems with excellent aesthetic results. Their use really brings out the natural qualities of the wood used. They are very popular for the coating of fine period furniture and elaborate pieces, ultimately providing an infinite array of aesthetic solutions.

ADDITIVES, OILS AND OTHER PRODUCTS

Additives are products used to correct or optimise coatings. Oils are products of a synthetic nature, easy to use. They are excellent for wood reviving products for the furniture and flooring and restoring gloss level, bringing out the natural grain and producing a unique effect.

PIGMENTS, COLORANTS AND DYES

Pigmented pastes, soluble and insoluble colourants whose purpose is to produce the desired shade of colour. Pigmented topcoats hide the substrate completely, insoluble colourants provide a harmonizing effect appearance without hiding the substrate completely, while soluble colourants allow the wood grain to show through.

REDOX POLYESTERS

Polyester wood varnishes, especially primers, offer high hiding power and excellent performance for high gloss coating systems. They’re often used for coating fine furniture, such as in boat wood interiors. High-filling power redox polyesters are used, above all, in gloss-topcoat systems.

WATER-BASED FOR INTERIOR USE

Aesthetic results are key when coating furniture. Hydroplus water-based paints can be used to produce topcoats whose appearance and smoothness are proven to be indistinguishable from those achieved with solvent-based products. They ensure the same kind of mechanical strength and chemical resistance as two-pack polyurethane topcoats.

Today’s environmental conscience with focus on the health of operators and end customers alike calls for furniture to be coated in an environmentally compatible way. Hence with as little solvent emission as possible, both during the coating stage and during the products’ slow final drying in people’s homes. Varnishers are choosing products that contain as few harmful substances as possible. Sayerlack is at the forefront of this research.

 

The best Sayerlack products

ACRYLIC HIGH GLOSS SELF HEALING TOPCOAT TLV3778/00

TLV3778/00 is an acrylic high gloss topcoat with high build, glossy, and performing. Like a standard acrylic paint, but with the ability of self heal most part of the damages due to mechanical stress.

 

SILKY FEEL

Interior design, following a trend that does not know countertrend, requires extremely opaque surfaces, but enhanced with the refinement of the materials used and exceptional softness to the touch. 

Clear opaque acrylic topcoat TZL3731/00 SILKY FEEL designed for the flat parts of furniture, gives: 

• matte surfaces
• beautiful depth of colour
• tactile softness comparable to silk. 

Opacity becomes warm and touch is soft and natural. SILKY FEEL enhances the grain and shades of dark or dark colored wood. 

SILKY FEEL combines velvety tone and exceptional softness to touch with excellent surface hardness and high chemical resistances. The soft matte tone is warmed by the effect of the topcoat: clean and minimalist elegance, almost elemental, sophisticated and refined by the tactile experience. The acrylic formula provides excellent resistance to light exposure and significant chemical and physical resistances, even at low angles. 

By touching the matte surface finished with SILKY FEEL, the skin meets the wood fiber, soft and caressing as silk. A natural but serious elegance, a fundamental and delicate refinement stimulated by tactile effects.

NOT-ISO PU ISOCYANATE FREE POLYURETHANE COATING SYSTEM

The NOT-ISO PU concept has produced a new coating system with a much reduced hazard classification. It matches traditional polyurethane product performance in the decoration of wood furniture. In fact it replaces isocyanates and their derivatives with alternative reagents. NOT-ISO PU coating system is composed by a clear basecoat and a clear topcoat, to be applied by spray. 

Basecoat TB0200/00 is characterized by excellent coverage and flow, high vertical hold-up and exceptional resistance to temperature variations. 

Topcoat TN01**/00 is characterized by excellent leveling, uniformity of opacity, and good softness to the touch. Hardener TJ0300/00 can be used for both basecoat and topcoat. It reduces the number of products to be kept on stock, making this a good choice coating system for use in “lean manufacturing” processes. 

Testing of the NOT-ISO PU coating system has shown exceptional chemical resistance. In some cases better than that of a traditional polyurethane coating system, such as pressure whitening, light fastness and alcohol resistance. The aesthetic appearance of NOT-ISO PU coatings is equal to that of a typical high-quality polyurethane coating system. NOT-ISO PU is available in different gloss levels. 

WATER-BASED WAX-EFFECT OIL AOV2343/00

The water-based wax-effect oil AOV2343/00 is designed for treating indoor furniture and it nobilitates the surface with a soft and waxy touch, maintaining a natural look. 

It can be applied using a spray gun, a brush or a rag. 

AOV2343/00 is a waterborne oil with a natural fragrance of beeswax. Similarly to solvent-based oils, maintenance should be carried out according to the wear the item is subjected to. 

AOV2343/00 can be mixed with 5% of AH1564/00 to improve the product’s adhesion and chemical resistance while maintaining its long pot-life.

We recommend to add the hardener when treating woodflooring or when a surface that has already been treated needs renovating to achieve maximum performance.

AOV2343/00 can be coloured using dyes and/or pigments from the AC2110/XX, AC0600/XX, AC1810/XX, XA2006/XX and XA4034/XX series.

 

H₂NO

This new high transparency coating has a strong waterproof effect and good outdoor resistance. It is outstanding at repelling water, with good permeability and wet on wet adhesion. Good results on various types of wood. 

The coating works just like new generation fabrics used for high mountain clothing, allowing moisture out. The technology is based on a special organic – inorganic hybrid polymer with a self-crosslinking mechanism. All in the most environmentally friendly solvent available: water. The product is suitable either for vertical or angled substrates, making it easy for water to flow away.

 

HYDRO GOLD is the cutting edge of our outdoor product range: internationally patented and guaranteed to last up to 18 years.

Sayerlack offers the HYDRO GOLD product line, to be applied on coniferous and broad-leaf wood, in 3 different coating systems:

• transparent coating system for coniferous wood
• transparent coating system for broad-leaf wood
• pigmented coating system for coniferous and broad-leaf wood

 

WATER-BASED OIL COATING FOR EXTERIORS A0V3793/00

This water-based oil coating is designed for the treatment of outdoor wood, such as benches and other garden furniture.

Based on emulsified oils and waxes, AOV3793/00 produces a natural effect while also protecting against the elements for many years. 

The specially formulated product exhibits excellent UV and water resistance to delay the greying of timber and maintain the natural beauty of the wood. 

Application is possible by spray, rag, brush, dipping or flow-coating and should be made in 2-3 layers depending on the timber and the desired surface. Surfaces should be inspected and maintained at regular intervals by applying 1-2 coats. The formulation of the product is mostly made up of natural raw materials, (about 25%) making this product nature and environmental friendly.

SAYERLACK TU0218/XX POLYURETHANE SELF-SEALER FOR EXTERIORS

TU0218/XX is a two-component opaque pigmented self-sealer with exceptional weather resistance, for coating wooden doors and door and window frames, garden furniture and products exposed to the elements.

A documented success in the Sayerlack R&D laboratory, TU0218/XX shows incredible performance in its resistance to bad weather, jumps in temperature, UV rays and chemical attack. As well as lasting extremely well, all over the world. Tests carried out by Sayerlack or commissioned to specialised institutes reveal that even in the most aggressive seaside and mountain environments the TU0218/XX film does not deteriorate or crack. 

The product also survived eight years at an altitude of 1.500m on Mount Bondone unscathed, as certified by the CNR (National Research Institute for Wood Technology) in San Michele all’Adige (Trentino province).

A BIG EASY SOLUTION TO APPLY TO HARD AND SOFT WOODS

TU0218/XX can be used as a single product to be applied in two coats, one base and one top, after application of the TU0250/00 sealer.

Suitable for spray coating, horizontal or vertical, with any equipment, including electrostatic systems. 

Easy to apply, it does not raise the wood fiber and is unaffected by temperature or moisture related issued. The vivid colour, excellent spreading rate and optimum coverage mean that TU0218/XX is one of a kind. It can be used on both soft and hard woods, and on exterior MDF. The types of wood suggested for outdoor varnishing are softwoods with few knots and without natural resin.