Any surface must be primed before applying finishing coatings to it. This method of painting works ensures the durability of the paint. Alkyd primer has a high degree of resistance to aggressive environments. This primer is used to coat surfaces that need moisture protection. After complete drying, the protective primer layer is covered with alkyd paints. It is not recommended to use paints that are not compatible with the soil for this purpose.
Main properties and scope
Alkyd primer is almost universal. It is used to improve the quality of surfaces of wood, metal, glass, galvanized steel, concrete.
An alkyd primer applied to external metal structures and technical details of buildings and industrial structures will reliably protect them from corrosion. Later, the primed metal surface is painted with alkyd paint (enamel). This combination of coatings gives the metal corrosion resistance.
Primed metal will take much less paint. The polymers that make up the soil fill all the small gaps and pores present on the metal surface. Thus, additional mechanical surface protection is created.
Alkyd primer can be used on wooden surfaces before applying decorative and finishing materials (paint, putty, glue). If the wood surface is primed, then to create an external protective layer, in addition to alkyd paints, you can apply liquid wallpaper. Such a combination of finishing materials with the base gives an excellent result, providing the tree with durability.
Due to the high ability to adhere soil and liquid wallpaper, a coating is created that is inseparable from the wooden surface. Wood can also be painted using alkyd impregnation in one or two layers.
Concrete, like metal and wood, after applying protective soils, should be painted with alkyd paints.
Completely dried alkyd soil creates, thanks to the polymers contained in it, a protective film. Therefore, the primer, alkyd paints and impregnations are suitable for use in outdoor works and interior decoration.
Alkyd primer compatible with alkyd impregnation, alkyd and acrylic paints, nitro paint, PVA glue and acrylic filling. It is not recommended to use this type of primer for finishing work on gypsum, plaster and any other sprinkling building materials. This does not apply only to concrete.
to contents ↑Types of soil
Alkyd primers come in several forms. The attitude to a particular group is determined by their composition.
- Glifthal. Their main difference is that they consist of a coloring pigment and filler. They, like alkyd primers, find their application in finishing work outside the building and indoors.Used to create a protective film on the surface of concrete, wood, metal, glass. Enamels and paints are laid on top of these soils. Glyphthal primers having a wide range of applications are called universal or general purpose primers. There are certain types of this material that can only be used on metal surfaces. They are distinguished by the ability to create a water-repellent film with anti-corrosion properties.
- Perchlorovinyl primer is intended for application to metal, plaster, concrete. Not used for indoor use. Dries in an hour.
- Polyvinyl acetate primer. Dries in half an hour. Apply only in combination with alkyd paints.
- Polystyrene primer. It can only be used for outdoor outdoor work because of its high toxicity. It is suitable for use on wooden substrates.
- Alkyd-urethane primer-enamel. Designed for coating metal surfaces of vehicles and exterior metal structures. Differs in the increased moisture resistance.
Technical specifications
Alkyd soil, containing various polymer compounds, has a large number of positive qualities and universal properties:
- Gives surface strength to the base material.
- Increases the corrosion resistance of the metal.
- Helps protect against mold and mildew.
- Prevents the growth of putrefactive bacteria
- The protective film created by alkyd compounds is resistant to large temperature differences.
- The use of primers reduces the cost of creating a coat of paint.
- Thanks to the protective properties of the soil, the mechanical strength and durability of the substrate are increased.
- The primer protects against aggressive environment and chemical compounds.
- Priming allows to reduce the swelling of the tree from moisture.
Application technology
Alkyd soils can be used for primary finishing works - external and internal, during reconstruction and major repairs of premises. The most common primer GF-021 has the best qualities of alkyd compounds. Therefore, if in doubt, what kind of soil to purchase, it is best to buy GF-021.
An alkyd primer is manufactured industrially. Purchased in a store, it is already ready for use. Before use, you must familiarize yourself with the instructions for use. Usually this material is just a few colors:
- Gray,
- dark brown,
- brown with a brick tint.
Since the film subsequently formed by polymer compounds is coated with paint or enamel, color does not play a special role. However, if you plan to paste the walls with light wallpaper, you should choose a different primer.
- Before starting work, surfaces made of concrete, metal or wood must be cleaned of old paint, rust and any other contaminants, degreased, allowed to dry. You should remember about precautions when working with the composition: in order to avoid irritation on the skin, hands should be wearing gloves.
- The primer is thoroughly mixed before application. To dilute it, use white spirit or other organic solvents.
- It is possible to apply soil on the processed surface with a brush or roller. If necessary, after the first layer has dried, the process can be repeated.
- The soil dries completely during the day. Due to its excellent frost resistance, alkyd soils can be stored at low temperatures.
A big minus in the use of alkyd primers is their high toxicity and fire hazard. Therefore, when working with solvents and the composition itself, it is imperative to follow all necessary safety measures: protect the skin of the hands with gloves, and the respiratory tract with a respirator.Otherwise, this is a fairly convenient material that does not require special tricks when using.
