Alkyd paint for wood for outdoor use - instructions for selection and application!

Wood is a natural, environmentally friendly and affordable material that brings warmth and comfort to the atmosphere, but is considered impractical due to the fact that it quickly collapses from the effects of the external environment. Stronger concrete and brick structures are less beneficial to human health and less decorative.

But the problem of protecting wooden surfaces is quite simply solved by impregnation or painting with special compounds. It is important to choose moisture-resistant, wear-resistant paints - an alkyd paint for wood for outdoor use may be an ideal choice. Some formulations are able to protect wood not only from the effects of ultraviolet radiation and fungus, but also from damage by pests.

Alkyd paints are obtained by mixing a binder component - an alkyd resin, a coloring pigment and a solvent (kerosene, white spirit and others). Sometimes the mixture includes a desiccant, which affects the drying rate, thixotropic (avoiding spreading) and antifungal additives. Such a coating is water-resistant, dries quickly and does not turn yellow, unlike some other paintwork materials.

Advantages of alkyd paints for wood for outdoor use

Despite their versatility, such compositions are rarely used for interior work because of their specific odor, which persists even after drying.

The disadvantages can also be attributed:

• lower environmental friendliness, in comparison with water-dispersion paints,

• fire hazard,

• instability to alkaline effects.

Paint marking

Alkyd paints have their own classification, which allows you to better navigate when choosing products for various types of work.Each type has its own alphanumeric index, the letters in which denote binders:

• GF - glyphthal resins, consisting of organic oils and special additives.

• PF - pentaphthalic resins, paints based on them have high resistance to adverse conditions and are used for outdoor work.

The last numbers in the index reflect the position of the alkyd paint in the catalog.

The first number in the code indicates the area of ​​application:

• 0 - primer ;

• 1 - the composition is suitable for outdoor use;

• 2 - used for indoor use;

• 3 - paints for preservation and temporary protection;

• 4 - water-resistant compounds;

• 5 - composition with special properties: anti-slip, glows in the dark, scares away small rodents;

• 6 - oil and petrol resistant composition;

• 7 - resistance to chemical reagents;

• 8 - resistance at high temperatures;

• 9 - electrical conductivity and electrical insulation.

Varieties of alkyd paints

1. PF-115 - one of the most popular paints, it can be used for primed surfaces, including wood, outside and inside the premises.

It is applied in two layers, creating a durable moisture-resistant surface that does not turn yellow or fade. Its popularity is explained by its affordable price, good technical characteristics and a varied palette. There are more than 20 shades of this paint. PF-115 is diluted with white spirit or turpentine (you can use a mixture of them in a 1: 1 ratio). The layer dries from 8 to 24 hours.

The covering ability is not very high: 30-120 g per 1 m2.

2. PF-133 - used for painting wagons, containers and other surfaces, with the exception of agricultural machinery. It is necessary to apply in several layers on the prepared (primed) surface. One layer dries up in 2 hours.

There are 15 shades. The properties are preserved for 5 years. Before use, it is diluted with a solvent, xylene. Coverage: 20 to 120 g per m2.

3.

PF-126 is sold together with the NF-1 desiccant, which accelerates drying. It is used for wagons, metal, wood surfaces that are exposed to atmospheric influences. It is diluted in the same way as PF-133. Dries up in a day.

There is a special type of compositions - oil-alkyd, which are made on the basis of special resins.

These paints are less popular as they dry slowly and turn yellow over time, but due to their low cost they are often used as primers. For such use, they must be diluted with white spirit. The marking is the same as for alkyd - GF and PF.There are also varieties obtained using natural (MA 021) or artificial drying oil (MA 025).

Prices for different types of alkyd enamels

Construction enamel

Consumption of alkyd paint per 1 m2

Wood has a porous structure and absorbs moisture strongly, therefore the consumption will turn out to be somewhat higher than when painting, for example, metal.

The required volume is calculated based on the surface area. You also need to know the hiding power of the paint and its dry residue - these indicators are usually indicated on the packaging. It is better to take a little more of what you need than to go back to the store for an extra can later.

Opacity is a parameter that shows how much material is needed to cover the main color, and dry residue - how much substance will remain after the composition dries. On average, for alkyd paints, the first parameter is in the range of 30-140 g per m2.

The formula for the calculation is as follows: the spreading rate is divided by the dry residue, and the result obtained is multiplied by 100. This will be the consumption per m2. To get the amount you want, simply multiply the flow rate by the surface area.

Required tools

It is recommended to use alkyd compounds for painting frames, entrance doors, platbands and facades of wooden houses. When working with paints, you must use personal protective equipment: glasses, a respirator, gloves, and also observe safety precautions.

If the composition gets on the skin, you must immediately remove it by wiping with a rag, and rinse the contaminated area under a copious stream of water.

For painting you will need:

• alkyd paint;

• solvent (for degreasing wood and thinning paint);

  

  Thinner for alkyd paints

• rags or cloths;

• putty for elimination of large irregularities;

  

  Putty for wood

• tools: brushes, rollers or spray gun, spatula, ditch;

• primer for wood;

  

  Primer for wood to be painted - tips for choosing

• masking tape;

• sanding block and sandpaper.

  

  Grinding block

Before using the alkyd compound:

• pre-clean the surface from old paint and dirt;

• degrease it;

• sand with fine-grained sandpaper;

• get rid of dust.

Important! Alkyd paints are highly flammable, therefore they should not be used near open fire.

Prices for wood preservatives

Impregnation for wood

Preparation for painting

There are many ways to remove old paint, including using a building hair dryer or a special compound, after processing which it softens and is easily removed with a spatula.

The latter option requires the mandatory use of protective equipment, since most of these formulations are toxic.

Even if the package states that the composition can be applied to old paint, you still have to remove flaky particles. For filling cracks with a depth of more than 1 mm, wood putty will be required, uneven places also need to be sanded.

Then a primer is applied to help reduce paint consumption, improve adhesion and extend the life of the wood.

Important! It is necessary to dry the primed parts well (preferably within a few days), since alkyd compounds do not tolerate application to a damp surface.

It is not recommended to paint the wood after rain, as the coating may crack. The moisture content of the material can be measured with a special device. It should not be higher than 17%. Optimal - 14%. In the presence of a fungus, the affected areas are dried and treated with special compounds.

Application of paint

Before opening a can of paint, it is recommended to shake it up and stir it before application. White spirit or kerosene is used for dilution, but usually the composition is sold ready-to-use. If this is necessary (for example, when using a spray gun), then some of the paint must be poured into a separate container and, stirring constantly, add the solvent to it in small portions.

White paint works best for windows, as it reflects sunlight and heats up less, resulting in longer life.

When painting windows, stick masking tape on the glass so as not to stain the glass.

A wide spatula can be used. In order not to scratch the glass, it is moistened with water.

For flat surfaces it is more convenient to use a roller, rough ones are painted over with a brush.

The next layer is applied only after the previous one is completely dry. Drying speed depends on the type of paint.

To make the coating last longer, a top coat can be applied to the surface after painting.

Prices for different types of finishing varnishes

Construction finishing varnish

Alkyd paints are suitable for a wide range of jobs, wear-resistant and affordable at a price, because they will be among the leaders of paintwork materials for a long time.

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