The variety of paints and varnishes on the construction market is now so wide that sometimes even specialists are at a loss before choosing: how to paint heating pipes. No one is interested in regularly repainting and tinting the pipelines in the apartment, therefore, the requirements for the durability of the coating come first.
Properly selected paint will not only protect the metal from corrosion and emphasize the style of the room, but will also last a long time without cracking and retaining the original color. Following the recommendations of professionals, you can quickly and efficiently paint pipes with your own hands.
paint material requirements
Before proceeding with the choice of paint for heating pipes, it is necessary to decide what functions the coating should perform. The main task is, of course, the protection of the metal from external corrosion. Recently, in order to give the elements of the heating system a decorative look, even plastic pipelines and heating devices already covered with a protective layer are being painted. In this case, you can use paint without anti-corrosion properties.
Before painting central heating pipes in an apartment, it is necessary to take into account such an important factor as smell. It refers not just to discomfort during work. A sharp persistent aroma indicates the presence of toxic substances in the composition of the material and can be dangerous to human health at high concentrations. Due to the fact that it is difficult to provide ideal ventilation of the room, it is worth giving preference to odorless paints.
To ensure that the applied coating does not fade and does not crack over time, it is necessary to take into account the operating conditions. Since the temperature in the heating system is elevated and usually fluctuates between 40 and 80 ° C, the paint must be resistant to such heating. For periodic cleaning of pipes from dust and other household contaminants, resistance to abrasion and aggressive media is important.
Based on the foregoing, paint for heating pipes should have the following properties:
- the ability to withstand temperature extremes and heating up to 90 ° C;
- abrasion resistance;
- resistance to aggressive environments;
- good adhesion to the appropriate substrate;
- the possibility of applying directly to rust;
- smell and safety for human health;
- suitable color range.
To obtain the best effect, you should choose paints marked “for radiators” or similar. In this case, resistance to elevated temperatures and color retention are guaranteed. Of the inexpensive options, PF-115 enamel corresponds to most of the listed requirements. Heat-resistant silicon-based enamel KO-168 also gives good results. It is better to refuse oil paints, since their color inevitably fades over time, the applied coating dries for a long time and stinks noticeably all this time.
Important! To protect metal surfaces from environmental influences, the composition of the paint must necessarily contain a corrosion inhibitor. When using a decorative coating of pipes without this additive, it is necessary to first apply a layer of a special primer for radiators. Lead-red lead primer number 81 is considered the most suitable.
Paints suitable for heating pipes are divided into 3 types:
- alkyd enamels;
- acrylic enamels;
- water-dispersion compositions.
Alkyd enamels are quite common due to the most affordable cost. This is where their benefits end. Alkyd enamel is the most smelly of the above list of paints, even after drying for some time it gives a characteristic unpleasant odor when the heating system is operating, and slightly fades over time. The change in color is especially noticeable in the case of coloring in white, for the rest this feature can be ignored. The period of complete drying is 24 hours, after 4 — 6 hours it is no longer sticky.
Acrylic enamels are based on organic solvents, so there is a specific smell when working with them, but it is noticeably less than that of the previous type. These paints have a very wide range of colors, dry in 1 hour, but in most cases require preliminary priming of metal surfaces. Acrylic paints are glossy and matte. The former shine beautifully, while the latter hide the irregularities of the painted surface well. At the same time, the original brightness of the color is preserved.
Water-dispersion paints are considered the safest for health. At the same time, they are not inferior to the rest in terms of durability and beauty of the coating. These are quick-drying, odorless paints. It is only necessary to check the presence of a special mark on the bank, indicating the possibility of using it for heating appliances.
The most popular now paints of the following brands:
- Radiator Paint;
- Elementfarg Alkyd;
- Mipaterm 600;
- Priming enamel UNIPOL;
- Enamel VD-AK-1179;
- Enamel GF-0119.
As for color, it all depends on the features of the interior, lighting and aesthetic taste of the owners. In addition to the standard spectrum, you can use metallic paints for gold, silver, chrome, bronze, combine different colors or apply patterns. From the point of view of heat engineering, dark shades are preferable, as they contribute to better heat transfer.
Pipe painting instructions
In order for the result to be pleasing and the painting work not to be redone, spending extra money and time, it is necessary to adhere to the technology and follow the recommendations of specialists. The quality of surface pretreatment often has a greater impact on the durability and aesthetics of a coating than the choice of paint.
First of all, you need to take care of the protection of the floor, walls and surrounding objects. For this, old newspapers, magazines, oilcloth or construction film are suitable. No matter how carefully you try to do everything carefully, the paint can still drip or splatter in the most inappropriate place. Therefore, it is better to play it safe, so as not to think later, than to remove paint stains.
On a note! Personal protective equipment is useful for work: gloves, a hat, work clothes that you don’t mind getting dirty. If you use scented paint, you will also need a respirator.
Before painting, the surface of the pipes must be cleaned of dust, dirt and old paint. If the previously applied layers of paint are thin enough, hold well and do not crack, then you can leave them and get by with just cleaning with sandpaper. Especially carefully you need to process places with rust. White spirit or any slightly alkaline solution does a good job of degreasing the surface.
You can get rid of old paint in the following ways:
- With the help of a special solution for rinsing.
A gel-like liquid is applied to the surface and wrapped with a film. After a short period of time, the old coating softens and is easily removed with a spatula, scraper or wire brush. Paint remover has a pungent odor and contains aggressive toxic substances, so you need to work with extreme caution.
- With a blowtorch.
The paint heats up and comes off easily with a spatula or similar tool. Can only be used for outdoor work.
- With the help of a building hair dryer.
Due to heating, the old coating easily lags behind and is cleaned off with any sharp object. This method is similar to the previous one, only simpler and safer, it can be used in any room. Due to the ability of the metal to quickly give off heat, it is not always possible to warm it up well, so in some cases the use of a hair dryer will be ineffective.
- Using a drill or grinder with a nozzle in the form of a metal brush.
The old paint is peeled off quite quickly, but in hard-to-reach places the brush is powerless, it is necessary to use a narrow spatula, knife or chisel.
How best to remove paint from pipes and radiators depends on the availability of the right tool and subjective individual preferences. But in any case, the old cracked coating must be removed so that the new one fits well and lasts a long time. Then the surface is degreased, wiped with a damp cloth and dried.
After complete cleaning of all accumulated layers or when dealing with a new metal surface without a coating, an anti-corrosion primer should be applied if there are no special protective components in the paint composition. In some cases, the ability of the primer to improve adhesion to the substrate is important. If a 3 in 1 type paint is used, containing a rust converter, primer and color pigments, then you can immediately start applying it without prior preparation.
Important! Regardless of the type of paint and varnish material, work must be carried out in a well-ventilated area. Vapors of any paint contain substances that are better not to inhale unnecessarily. Therefore, it is recommended to ensure that pets, children and other family members are not present during staining.
There are several methods to paint pipes:
- Spray can;
- Spray gun or spray gun.
Applying paint with a brush is the most common and affordable option. In this case, special skills are not required. It is enough just to take a good brush and, picking up a small amount of paint on the tip, evenly, slowly, smear it over the surface. It is necessary to strive to make the layer as thin as possible. This will give uniform coverage and no smudges. If the paint is translucent, it is better to paint again later than to apply one thick layer.
Advice! In cheap brushes, the bristles often fall out. Therefore, it is not worth saving on their cost. However, even high-quality specimens sometimes leave hairs. If necessary, the villi can be removed with a needle.
It is very convenient to paint pipes and batteries with a special radiator brush. It has a long handle and a curved shape that makes it easy to cover all hard-to-reach areas.
With the help of small diameter foam rollers, it is convenient to paint an open pipeline in the presence of free space around. They are also suitable for the front surface of heating devices. Craftsmen even make special devices from two rollers, which allow not only to ensure even application, but also to complete the work very quickly.
Sometimes simple washcloths are used for smooth pipes, allowing you to apply a neat thin layer on all sides. The gloves, of course, will be dirty, but the painting will be completed in no time.
Working with a spray can is the most convenient and fastest. It must be shaken for a minute and can be sprayed onto the prepared surface. Performing smooth zigzag movements, gradually cover the required area. It is important to maintain the distance recommended by the manufacturer and not linger for a long time in one place.
Aerosol cans give a nice decorative finish, but are expensive and don’t cover hard-to-reach areas well. In this regard, they are usually applied on a well-primed base or after a preparatory background coat of paint.
A professional spray gun is rarely used in everyday life, but if a lot of painting work is expected, then it is worth acquiring this device. The sprayer allows you to quickly apply even layers with minimal paint consumption and has special nozzles for the convenience of working with surfaces of the most intricate shapes.
Do-it-yourself work with the best result will help the advice of experts on how best to paint heating pipes:
- When removing the old layer of paint, it is important not to overdo it, making efforts so as not to damage the pipe connections.
- It is necessary to open the paint remover container very carefully, holding the bottle with the neck away from you, so as not to inhale toxic fumes. Work with this caustic substance can only be carried out if the room is well ventilated.
- If it is possible to dismantle the heaters, this will greatly facilitate the staining process. Radiators can be taken outside and painted in the fresh air, turning them in a convenient direction.
- Painting pipes and radiators is best done with the heating system turned off. Otherwise, the paint will lie unevenly on hot surfaces, there may be stains, swellings, spots and stripes.
- If it is necessary to perform work during the heating season, then you can get out of the situation by closing the valves on the batteries and waiting for them to cool completely. At the same time, it will noticeably get colder in the room, and only radiators will be painted well, since the pipes will still remain hot.
- You need to paint from top to bottom with gentle movements, slowly.
- You should strive to paint the surface from all sides, and not just from the front. Otherwise, the remaining parts will rust, and unpainted places are always noticeable, although not at first sight.
When choosing a paint for heating pipes, it is very important to pay attention to its resistance to heat and other operational features. The use of high-quality paints and varnishes will ensure safety for health during work and the durability of the applied coating.
Careful preparation of the surface for painting is the key to the quality of the future coating. A heater painted in accordance with all the rules will be reliably protected from corrosion and will retain an attractive appearance for a long time.