Rust paint for exterior use: primer-enamel, 3 in 1 compositions, application methods

Painting metal products extends their service life and also maintains an attractive appearance. The application technology is simple, it is much more difficult to decide on paint. We will help you choose a material taking into account operating conditions and select the best ones for interior and exterior work.

How to choose the type of paint for metal

All paints and varnishes are a complex composition of a binder, pigment and solvent. Depending on the type of binder base, paints are divided into more than 40 groups. The most suitable types for metal processing are alkyd, acrylic, epoxy and polyurethane. Previously popular oil paints, although they remain the cheapest, are significantly inferior to modern compositions in terms of coating durability.

Alkyd

the materials are excellent for processing galvanized products, are resistant to corrosion, but are not heat-resistant and have a high degree of toxicity. They must be applied using all precautions.

Acrylic

the mixtures are suitable for interior and exterior use, since they form a durable layer that is resistant to temperature changes, oxidation processes and ultraviolet radiation. Many 2-in-1 and 3-in-1 formulations are suitable for converting rust. One of the problematic aspects is the high cost.

Polyurethane

coatings should be chosen for painting structures made of aluminum and other non-ferrous metals. They provide a durable protective layer that is resistant to abrasion, chemical and thermal influences, and can be used for a long time in water and damp environments.

Epoxy

paints are able to protect metal from the most aggressive environment. They are used for painting electrical appliances, fuel tanks, acids and alkalis, automotive components, etc. There is also a drawback - the paint must be mixed independently in a certain proportion.

Depending on the area of ​​application, coloring materials are divided into weather-, water- and heat-resistant, electrical insulating, and special. According to decorative properties - hammer, fluorescent, shagreen, and according to the degree of gloss - matte, glossy, semi-glossy, etc. All this information is reflected in the marking.

Heat-resistant paints

Not all rust paints can withstand high temperatures. They are designed for heating no higher than 40-60 degrees. But metal structures such as stoves, barbecues, fireplaces, pipes and radiators, car parts and other equipment also need protection from corrosion.

To decorate them you need to use heat-resistant and heat-resistant paints. The degree of their stability is determined by the composition of the components. Among these dyes there are also several different types.

Prices for heat-resistant paints

Heat-resistant paints

It is important! In the vast majority of cases, all these structures should be painted in a cold state, and heated after the coating has completely dried. Although there are paints that require heat to polymerize. Therefore, carefully read the instructions with recommendations for use.

Comparison table of properties

When trying to choose the best paint for metal, you need to pay attention to a number of key characteristics and compare them with the intended operating conditions.

Recommendations and safety precautions

Safety measures during work are strictly observed. Otherwise, unexpected difficulties may arise. Follow the following rules:

• When working inside a building, it is first ventilated;
• If paint or thinner is spilled, sand is poured onto the stain to prevent a fire from starting;
• The master must wear a protective mask and gloves;
• You cannot eat indoors while painting;
• It is prohibited to pour paint into sewer pipes.

Safety measures during work are strictly observed.

Metal painting can be done at home, the main thing is to choose the right paint. Also act step by step to get a high-quality result that will last a long time. The article described how to paint metal correctly; following the recommendations will help you cope with painting.

The most popular manufacturers

According to the specialized magazine Coatings World, the key players in the coatings market are:

• Tikkurila (Finland) is a manufacturer whose main advantage is the stability and safety of its compositions;
• AkzoNobel (Netherlands) is the world's largest supplier of paints and varnishes, owner of the Hammerite brand, the first paint that can fight rust;
• The Sherwin-Williams (USA) is a transnational corporation with a 150-year history that produces paints in accordance with American environmental standards;
• Dufa (Germany) is a brand under which the largest range of paint and varnish products is produced.

The original products of these companies are of high quality, safety and effectiveness.

The essence and features of the method

The first paints for metal surfaces performed only the function of changing color. Such products could not stay on the material for a long time, for this reason, manufacturers decided to produce substances that, in addition to painting, serve as protection against the formation of rust and other negative factors affecting the strength of the coating.

Today, the market offers a wide range of coloring agents that can cope with these needs. There are different methods for painting iron; rollers, brushes, and a spray gun can be used.

Today, the market offers a wide range of coloring agents that can cope with these needs.

Top 10. Novbytkhim Primer-enamel 3 in 1

Rating (2021): 4.00

• Characteristics

  Price: 944 rub./3 l

• Country Russia
• Consumption: 120 ml/sq. m
• Complete drying time: 4 hours.

The primer-enamel contains components that clean the surface of rust and prevent its reappearance. The material can be applied directly over the problem area without wasting time and money on its preparation. Removing the layer of previous paint - oil, alkyd, water-dispersion, etc. - is also not required. The composition produces virtually no odor during operation, dries in 2-4 hours, and remains completely dry in 24 hours, so it is suitable for many institutions, except for children's institutions. But before choosing this material, it is important to know that it gives a glossy shine: as you know, gloss greatly emphasizes all the imperfections of the surface.

Advantages and disadvantages

• Duration of rust protection
• Possibility of spray application
• Ease of repair and restoration

• Few reviews

Maximum temperature limits for paints

Before carrying out work, you need to make sure that the established temperature regime is suitable for the purchased paint.

Previously, the minimum temperature at which it was allowed to paint the walls of residential and commercial buildings was +5 ° C. Now, however, dyes are being produced that can be used at zero temperatures and even in severe frost, down to -30 ° C. The upper limit at which painting can be done is considered to be +40 °C.

Top 9. Optimist F304 for outdoor use

Rating (2021): 4.09

18 reviews from resources were taken into account: Otzovik, Kraski.ru

Excellent weather resistance The paint is designed specifically for roofs, plinths, tiles, and can also be used on used galvanized drainpipes and gutters.

• Characteristics

  Price: 1920 RUR/14 kg

• Country Russia
• Consumption: 200 g/sq. m
• Complete drying time: 12 hours.

Acrylic-latex paint for exterior work can be used on different surfaces, even the most problematic ones - stone, slate, OSB, old galvanization, etc. Supplied in packages convenient in volume for painting small, medium and large areas - 4.5, 7 and 14 kg. They speak positively about the material on construction forums; the advantages include affordable cost and low consumption; the disadvantages include the need for careful preparation of the base. To paint, you need to choose a warm sunny day without wind or rain. A 2-layer application with an intermediate drying time of 1 hour is recommended. The coating is elastic, hides minor defects well, does not fade under the sun and extends the life of the painted metal for a long time, for at least 10 years.

Advantages and disadvantages

• Suitable for metal, concrete, wood
• Non-toxic, fireproof
• Good adhesion
• Available in ready-made colors

• Application temperature +5…35°
• Do not apply if there is a risk of rain

Application methods

To apply paint you can use:

1. Paint brush. Suitable for painting small parts. You can find brushes of different sizes on sale. The bristles can be natural or synthetic. For access to hard-to-reach places, the tool is equipped with an elongated curved handle.
2. Roller. Suitable for painting large flat surfaces.
3. Sprayers. The second name for the spray gun. A compressor is used to operate them. The coloring composition is supplied under pressure. The equipment is used by large enterprises, car repair shops, carpentry, and blacksmith shops.
4. Containers for dipping metal workpieces. This method makes it easy to paint parts with complex shapes.

Modern technology - powder coating of metal. The blanks are placed in a closed spray booth and covered with a layer of paint. Its particles receive a negative electrical charge and are attracted to the working surface, creating a dense, uniform layer. After applying the powder, the workpiece is placed in an oven so that the decorative layer bakes and becomes monolithic.

Paint brush

Top 8. DUFA Retail Metall

Rating (2021): 4.12

6 reviews from resources taken into account: Obi.ru

Economical consumption Anti-corrosion enamel has a large amount of pigment in its composition and a thick consistency. After dilution, it is advantageous to use it for painting large structures, and also apply it as a primer.

• Characteristics

  Price: 1750 rub./2.5 l

• Country: Germany (produced in Russia)
• Consumption: 1 l/12 sq. m
• Complete drying time: 24 hours.

Alkyd enamel 3 in 1 contains a decorative coating, anti-corrosion primer, and rust converter, so it is good for priming and painting new and corroded metal products. Due to its increased density, the material is difficult to apply, and the manufacturer recommends diluting it with white spirit. The paint itself does not smell, but in combination with a solvent a pungent odor appears, so it is more suitable for outdoor work. To prevent the material from forming smudges and drying quickly, reviews recommend diluting it with solvent in a ratio of 2:1 (manufacturer’s recommendation is 1:1). There are also complaints about the color palette - there is plenty to choose from, but the colors are too dark.

Advantages and disadvantages

• Pigment-rich 3 in 1 composition
• Favorable consumption and price
• Painting over rust

• Not tinted
• Dries slowly

Preparatory activities

To obtain the desired result, the painting process must be carried out with surface preparation. And also the choice of paint should be done with special attention. The combination of carefully performing all stages will help you get an excellent result with your own hands.

To obtain the desired result, the painting process must be carried out with surface preparation.

Paint selection

Before painting metal, it is necessary to analyze what functions the painting will have to perform, in what conditions the item will be used, and the type of product: fence, car, doors or other items. Then it will be easier to choose a coloring composition, and the result will be good.

Popular and common compositions suitable for painting have been described above. Here we will talk about the types that differ in obtaining special properties on the surface:

• If there is an area with rust, you can mix epoxy with chemical components, this will create a coating that delays the further spread of the lesion and a barrier against new formations;
• Hammer paints are a subtype of different paints. They are suitable for items used outdoors and create strong protection from external influences;
• Primer enamel is one product that includes the characteristics of a primer mixture and paint;
• Nitro paints are highly toxic, so they can only be used outdoors; they are produced exclusively in cans.

Hammer paints are suitable for items used outdoors and create durable protection from external influences.

Materials and tools

It is better not to interrupt painting; for this reason, make sure that all the necessary tools and materials are available in advance. You will need to prepare the following items:

• A primer solution that will suit the task at hand;
• Container for coloring composition;
• Roller, brush. The second is necessary for painting hard-to-reach places; a roller is more suitable for working with large products. You can choose a spray bottle.

It is better not to interrupt painting; for this reason, make sure that all the necessary tools and materials are available in advance.

Surface pre-treatment

To prevent painting from highlighting defects that were on the surface, you need to get rid of them. Therefore, a preparatory stage is carried out, including the following actions:

1. All dirt is removed. If there is an old coating, it is better to eliminate it.
2. A degreasing agent is applied, all areas should be treated, and the surface is washed again.
3. After the base has dried, a putty mixture is applied to obtain a smooth base.
4. Next, the rusty layer is removed, and a rust converter can be applied.
5. Small flaws can be removed by sanding.

If there is an old coating, it is better to eliminate it.

Top 7. MasterGood elastic

Rating (2021): 4.21

5 reviews from resources taken into account: VseInstrumenti

The best price for 1 kg of this paint costs about 340 rubles. It is very difficult to find a cheaper material for painting ferrous and non-ferrous metals with a safe composition and from a reliable manufacturer.

• Characteristics

  Price: 810 rub./2.4 l

• Country Russia
• Consumption: 280 g/sq. m
• Complete drying time: 4 hours.

The most budget-friendly of all paints for metals, MasterGood paint is sold ready-to-use. It can be applied to any surface using any available method. It is based on water, filler, latex, pigment and antiseptic. Compared to other water-based paints, it provides a more durable, elastic and durable coating that hides cracks and other defects, protects against water, steam, and UV rays. But the composition cannot be called wear-resistant; the manufacturer does not recommend applying it to heavily loaded surfaces. If metal or concrete is being painted, they must be primed first, otherwise the consumption will increase significantly, and rust will quickly appear in the old places.

Advantages and disadvantages

• No toxic substances in the composition
• Service life about 5 years
• Resistance to cracking
• The painted surface is washable

• Need base primer

See also:

• 10 best rubber paints

Description of materials

Many compounds that can be used to treat corroded metal are included in the group of water-dispersed (water-diluted) primers and primer paints. The latter include phosphoric acid, which is known to bind corrosion. Painting with these solutions allows you to create a polymer film on the structure - an excellent barrier from the aggressive influence of the external environment.

Top 6. KUDO heat-resistant enamel

Rating (2021): 4.35

16 reviews from resources taken into account: Yandex.Market, SamoKraska

High temperature resistance The paint in the can is made on the basis of an organosilicon compound and has received exceptional resistance to high and low temperatures.

• Characteristics

  Price: 210 RUR/520 ml

• Country Russia
• Consumption: 1 can/2 sq. m
• Complete drying time: 2 hours.

The enamel of the Russian manufacturer is used as an anti-corrosion agent for products exposed to strong (up to 800°) heating - automobile parts, pipelines, water heating and boiler equipment. Suitable for metal processing only, no pre-priming required. Spraying is done directly from the can; there is no need to use additional devices. The product is very easy to apply to objects of complex configuration. At the same time, the painting technique requires some skill: too thin a layer forms an uneven coating, excessive thickness leads to the appearance of smudges. Do not paint hot surfaces - the material may ignite.

Advantages and disadvantages

• Tolerates temperature fluctuations
• Does not fade from sunlight
• Provides protection against rust

• Toxicity of fumes when drying
• Risk of fire

See also:

• 10 best alkyd paint companies

Types of primers

1. Slowing down the process of rust formation.
2. Protective, based on phosphoric acid. A film is formed for a long service life.
3. Phosphating compounds work well with non-ferrous metals.
4. Insulating compounds form a durable film on the metal. Made from alkyd or epoxy material.

The technology for priming a metal surface is described on the product packaging.

When painting metals, special attention should be paid to safety precautions. Most compounds are toxic, so you need to wear respirators, goggles and gloves when painting.

Heaters and open flame sources should not be located near the surface to be painted.

Top 5. PANZER for metal

Rating (2021): 4.52

37 reviews from resources taken into account: Ozone, Otzovik

• Characteristics

  Price: 1995 rub./2.3 l

• Country: Serbia
• Consumption: 1 l/8 sq. m
• Complete drying time: 6 hours.

PANZER composition is a one-component protective and decorative material with excellent adhesion to rust-coated metals. Suitable for indoor and outdoor use, easy to apply with a brush, roller or spray gun. Before applying it, you need to treat the surface, removing dust, dirt, and loose areas from it. It is better to remove grease stains with a solvent. In the paint formula, the main role is played by alkyd resins, which polymerize very quickly. Because of this, it is recommended to paint in 1 layer; if necessary, you can add a 2nd, but no later than 2 hours after the 1st. The resulting coating lasts a long time, at least 5 years, and is stable, since it is not afraid of UV radiation.

Advantages and disadvantages

• Low price, economical consumption
• Wide range of shades
• Fast drying

• Toxic composition

Features of paintwork in winter

It is better to refrain from painting at temperatures of -5...+5 °C, since this range is considered unfavorable due to the formation of condensation. Moisture changes the properties of paintwork materials - the coating becomes of poor quality and does not last long.

Facade paints will take 2-3 times longer to dry in the cool season. You can improve the quality of the coating using a thermal gun. You can also attach film to scaffolding.

When choosing paintwork materials, you need to make sure that the composition is suitable for painting in frost. If the dye is not suitable for winter use, it will freeze. The quality of the paint also matters.

The temperature of the paint and varnish material must exceed 0 °C. If the composition cools more, the container containing it must be placed in a basin with preheated liquid.

Top 4. Zip-Guard Rust Preventive Metal Finish

Rating (2021): 4.56

Advantageous 3 in 1 composition One paint replaces the primer, intermediate layer and topcoat at the same time, forming a corrosion-resistant layer with a service life of up to 8 years.

• Characteristics

  Price: 1290 rub./0.96 l

  Read also:  Why the Neva walk-behind tractor does not start: reasons and repairs
• Country: USA
• Consumption: 3.79 l/23 sq. m
• Complete drying time: 7 days

The material can be applied directly to surfaces with rust without prior priming. The scope of application of the paint is very wide: people try to choose it for processing machinery, construction equipment, heating radiators, etc. The unique 3-in-1 composition not only simplifies the technology and saves money on the cost of work, but also provides a coating with special properties: it is durable and elastic at the same time. That is why Zip-Guard Rust Preventive paint is resistant to many chemicals, abrasion and environmental influences, while maintaining high decorative properties. This was confirmed experimentally when samples of painted metal were immersed in the salty waters of the Sea of ​​​​Japan. After 21 days, only Zip-Guard remained intact and protected the surface from corrosion.

Advantages and disadvantages

• Formula with rust converter
• Deep rich colors
• Can be applied directly to rust

• Small selection of colors
• Takes a long time to dry

See also:

• 10 Best Exterior Paints

Removing old paint and rust

To remove old paintwork, you can use a scraper, a wire brush, or sandpaper. If it doesn't hold well, then even a metal sponge for cleaning pans will do. When these methods do not give the desired result, high temperatures should be used.

To create them, a hair dryer or a gas torch is suitable. After this, it will be easy to get rid of the swollen and burst paint.

Removing rust is not that easy. This can be done both by mechanical action on the surface and by using chemical compounds. Here are some ways:

• Metal brush, spatula, sandpaper - an old, well-known method. It is practical only in places where it is easy to penetrate and where the layer affected by corrosion can be easily removed.
• A special drill attachment will greatly simplify the work.
• A core brush and a petal wheel for an angle grinder are an effective method when the area of ​​damaged metal is small and has a flat shape.
• The sandblasting installation allows you to remove rust even 15 years ago. Using this unit, you can clean a large area of ​​metal surface in a matter of minutes and without much effort, even in the most difficult to reach places.
• Citric acid is used if the product has not been painted and can be immersed in citric acid for 24 hours. There is another option for working with this compound: treat the surface with it, and then cover it with plastic film and secure it so that it does not slip. This method helps even with a thick layer of rust and in places where mechanical methods do not help.

If you apply table vinegar with a sponge to the treated area and rinse, you can easily remove a thin layer of rust.

• To get rid of a thick layer of rusty deposits, phosphoric acid is applied to the metal structure with a brush or spray. It is left for 12 hours, then washed off with soapy water. Extreme care must be taken to ensure that acidic agents do not get on the face, hands, or eyes when working in rubber gloves and safety glasses.
• Rust converters have appeared relatively recently. They usually take the form of an emulsion or suspension, which is applied for several hours after removing the exfoliated layer. It reacts with rust to form insoluble iron phosphate. Then the iron salts are washed off with plenty of water.

It is especially important to thoroughly clean those places where rust forms several layers and falls off in pieces.

Top 3. Sherwin-Williams SuperPaint Interior Acrylic Latex

Rating (2021): 4.65

257 reviews from resources taken into account: consumeraffairs.com

Best hiding power Paints from the progressive SuperPaint line, when applied in a single layer, cover the original color of the surface by 99%, which corresponds to class 1 according to the covering power classification table of DIN EN 13300.

• Characteristics

  Price: 990 rub./0.96 l

• Country: USA
• Consumption: 1 l/8 sq. m
• Complete drying time: 4 hours.

The composition of SuperPaint Interior Acrylic Latex is such that with one paint you can finish surfaces made of any materials, be it metal, plastic, wood, brick or stone. You can apply it in one layer - it is enough to give the product a perfectly new look. The material is declared to be thixotropic - in the jar it is thick like rich sour cream, but as soon as you stir it harder, the consistency becomes convenient for coloring. The paint applies to metal flawlessly, sets quickly - within an hour the coating dries “touch-free”, and after 4 you can apply the 2nd layer. The result is a strong, easy to clean and very durable film.

Advantages and disadvantages

• Composition 2 in 1 – paint and primer
• Versatility of use
• Excellent camouflage qualities
• Protects against rust, blistering and flaking

• Not suitable for outdoor use

How to coat metal before painting?

The most common are alkyd primer for metal GF-021 and epoxy EP-0010. It is applied mainly to ferrous metals. Its low price can be considered an advantage. Phosphating is used for surfaces of non-ferrous and ferrous metals.

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Top 2. Tikkurila Metallista

Rating (2021): 4.74

11 reviews from resources were taken into account: Otzovik, Yandex.Market

Optimal price/quality ratio Moisture- and heat-resistant paint can be used both at home and outdoors, on metal and cast iron products, is easy to apply, does not require base preparation, dries quickly and is no more expensive than its analogues.

• Characteristics

  Price: 2450 rub./2.5 l

• Country: Finland (produced in Russia)
• Consumption: 1 l/10 sq. m
• Complete drying time: 8 hours.

Tikkurila paint is chosen when it is necessary to combine several important properties: weather resistance, 3-stage rust protection, safety and durability. Due to its special composition, the material is not afraid of moisture, temperature changes, and can be used with equal success for processing cast iron and steel structures. According to the instructions, application in children's and medical institutions and administrative buildings is allowed. The 3 in 1 formula is supplemented with wax, which prevents moisture from penetrating the metal, and active components block the spread of corrosion. It is claimed that the coating provides long-lasting protection - for 12 years or more, but provided that it was applied correctly, in 2 or 3 thin layers with a drying interval of 1.5 hours.

Advantages and disadvantages

• 3 in 1 protection system
• Versatility of use
• Excellent wear resistance

• It is better to apply 1 layer at a time

See also:

• 10 best Tikkuril paints

Is it possible to paint metal?

Metal painting can be chosen as a treatment only if you know for sure whether it can be used. Often metal materials are made from black iron, its surface is not protected from the effects of liquids, for this reason, over time, water leads to corrosive formations. There are specialized anti-rust products on sale, as well as paints.

Galvanization has already received protection from these influences, but you can extend the shelf life of the material by additionally painting it.

Metal painting can be chosen as its treatment.