Wood impregnation equipment. Vacuum impregnation installation. Antiseptic for impregnation

For the production of impregnated wood the company “Standard Wood” applies processing Tanalit®. This processing is carried out in a special installation, the main part of which is an autoclave.

The impregnation process, or “vacuum-pressure-vacuum,” consists of several stages:

1. The initial vacuum removes air from the wood cells. Then the chamber is filled with the protective composition Tanalit®.
2. Hydrostatic pressure forces protective composition penetrate deep into the wood structure.
3. The vacuum removes the remaining protective composition from the surface of the wood. The reduced pressure inside the wood draws the protective compound from the surface.

As a result, the components of Tanalite ® are fixed in the wood structure in such a way that they become almost impossible to remove. The wood receives long-term protection from fungus, insects, including termites, and weather conditions.

Impregnation process

• Wood, impregnated Tanalite® under pressure - a proven and effective material for fences, walkways, garden furniture, equipment for sports and children's playgrounds, as well as for use in building structures and external cladding of buildings.
• Wood, impregnated Tanalite®, is protected by a unique highly effective preservative, the action of which is based on the patented technology of using copper threazoles. Tanalith provides long-term protection against the destructive effects of microorganisms (fungi, mold) and insects. Demonstrates high color fastness when used both indoors and outdoors. outdoors.
• Wood, impregnated Tanalite®, approved by certified bodies in more than 30 countries. Arch timber protection has conducted extensive laboratory and field testing of treated timber.

What is Tanalith?

Nowadays, almost any reasonable person understands that reliable and durable protection of wood can only be achieved through through impregnation in an autoclave. This method in Europe is called impregnation, and in Russia it is called the “vacuum-pressure-vacuum” method. Almost any wood product used outdoors, and often indoors, in Europe has a characteristic greenish tint. Green color is the color of Tanalite®, the market leader in long-term wood protection in most European countries, including Scandinavia, as well as America, Australia and Oceania.

Tanalit® (Tanalith®)– a preservative for the bioprotection of wood, which is produced by a British corporation Arch Timber Protection. It is used by the impregnation method (vacuum-pressure-vacuum). Tanalite ® protects wood from rot and insects for a period of 15 to 100 years, depending on service conditions, and is approved for use almost all over the world, including in Russia.

To ensure longevity, wood and wood products should be protected. How much protection is required? Of course, this depends on the conditions under which the wood is used.

In Europe, according to BS EN 335, the service conditions of wood are divided into five classes (the so-called Hazard Classes, literally translated - hazard classes):

Hazard Class 1 – wood intended for indoor use, there is no risk of moisture, i.e. Humidity during operation does not exceed 18%. This class includes almost all wood and wood products used indoors.

Hazard Class 2 - indoor use, but with a risk of moisture - there is a possibility that during operation the humidity will exceed 18%. This class includes almost all construction and frame wood, as well as window frames, doors, walls, floors, partitions inside the building, etc.

Hazard Class 3 - outdoor use, but without direct contact with the ground. Here we will include external cladding buildings, ceilings, cornices and trim, gates, pergolas, gazebos and much more. Sometimes Hazard Class 3a is also distinguished - the use of wood outdoors, but without direct contact with precipitation, for example, under a canopy or under waterproof painting.

Hazard Class 4 – use in direct contact with the ground. These are elements such as fence posts, cellars, decking, joists, railway sleepers, telegraph and transmission poles and crossbeams, etc.

Hazard Class 5 – use in direct contact with sea and river water. These are supports for bridges, piers, fairways, etc.

The average service life of wood treated with Tanalite® is 60 years for Hazard Class 1 and 2, 30 years for Hazard Class 3 and 15 years for Hazard Class 4. And these are not just words, because the company ArchTimber Protection has been on the market since 1917 and relies on enormous experience in the practical use of Tanalite®, as well as a powerful research and development department.

Tanalit-E® can be used in a variety of areas:

• Construction wood used in public buildings and agriculture;
• Bridges;
• Fairways, waterways, piers and other timber for river and sea objects;
• Noise barriers along roads and other noise sources;
• Avalanche barriers;
• Fences and barriers along roads;
• Fencing around livestock farms (except for farms for rodents, deer and other animals that can gnaw wood);
• Land retention systems;
• Energy and telegraph poles.

Here is how the director of international sales at Arch Timber Protection comments on the decision of the European Commission Malcolm Jones:

First of all, it should be recalled that CCA-based preservatives have been used effectively and safely for more than 50 years. This is reflected in the fact that the European Commission directive does not apply to CCA-treated wood that is already in use. Wood processors can feel confident that they have produced a safe and quality product throughout the entire period of use of SSA, and they can also be confident that there will be no restrictions on the use of previously treated wood. Arch began developing a chromium- and arsenic-free preservative as an alternative to CCA preservatives in the mid-1980s. The developed product Tanalit-E® has now firmly taken a leading position among preservatives without chromium and arsenic in almost all of Europe, the USA, Australia and other countries Far East, including where laws restricting the use of chromium and arsenic have been in place for a number of years. The high efficiency of Tanalite-E®, combined with its environmental friendliness, allows our customers to be competitive, especially with the growing demand for treated wood from the consumer-oriented market. The basis of Tanalit-E®, a new generation product, is copper and organic biocides (azoles). Tanalit-E® is approved in many countries around the world for housing and garden construction, landscape architecture, children's playgrounds, etc.

Wood is a light and durable material, it can be easily processed and is actively used in a variety of industries. However, like other natural materials, it is susceptible to many destructive factors: fungal infections, mold, insects. As a result of such negative impact, its mechanical and decorative properties, service life is reduced. In order to save beneficial features wood, it is necessary to treat it with antiseptics.

Antiseptics (from the Greek άντί - against and σηπτικός - putrefactive) - chemicals, protecting wood from biological destruction (rotting, mold, woodworm damage). When wood is impregnated with an antiseptic, its structure is deeply filled with the components of the antiseptic composition, which helps to ensure truly effective and long-lasting protection. There are several methods of antiseptic treatment: brushing/spraying; dipping; impregnation under pressure. Let's look at each method in more detail.

Applying antiseptics with a brush/spray

Brush application (painting) and spraying are the most common methods of treating wood with antiseptics. When applying an antiseptic with a brush or spray, the protective layer on the surface of the wood is quite thin, which provides very limited protection from ultraviolet exposure. As a rule, wood that has undergone similar processing is used for finishing interior spaces low humidity.

Dipping in antiseptic

Antiseptic treatment of wood by immersion (dipping) is performed using special antiseptic baths. This type of processing is carried out in industrial production conditions.

With the help of special submersible devices the wood package is immersed in the impregnation bath, held there for a while, then lifted. Excess antiseptic solution is removed from the wood spontaneously by dripping. When processed by the immersion method, a protective layer 1-2 mm thick is formed on the surface of the wood. Wood treated in this way can be used both for finishing interior spaces, in which the humidity level is no more than 20%, and for exterior surfaces, but in this case, the treatment must be repeated after 4-6 months.

Impregnation - impregnation of lumber with antiseptics under pressure

Impregnation of lumber with antiseptic compounds in an autoclave under pressure (impregnation) is the most effective method wood protection. With this treatment, the antiseptic composition penetrates deep into the pores of the wood and fills it.

Antiseptic treatment of wood using the “vacuum - pressure - vacuum” method is carried out only in industrial conditions using an autoclave.

The surface of wood impregnated with an antiseptic in an autoclave is destroyed tens of times slower than that treated with a brush, and the impregnation, located deep in the pores, prevents damage to the wood by bioorganisms and atmospheric exposure. This processing method ensures deep impregnation of the sapwood with an antiseptic. Wood that has undergone this treatment can be used for outdoor use under conditions of constant contact with the ground and atmospheric exposure.

For better penetration of the antiseptic solution into the pores of the wood, before starting treatment, all air is pumped out of the autoclave (a vacuum is created), after which an antiseptic solution enters it, which, under the influence of excess hydraulic pressure, fills the wood pores freed from air. Due to the reduced pressure in the wood, when atmospheric pressure is restored in the autoclave, the solution from the surface is drawn into the lumber.

The processing scheme using the double vacuum method is shown in the figure.

Autoclave operation

As a rule, an autoclave is a steel cylinder with a diameter of 1-2 m, a length of 13-27 m. The ends of the cylinder are equipped with hemispherical lids, one of which is always tightly closed, and the other is hinged on the side; The connection design is hydraulic. The boiler contains tracks for trolleys.

Impregnation with an antiseptic composition is carried out in autoclaves under pressure above 12 bar using initial and final vacuum.

After loading the impregnated material into it, the autoclave is hermetically sealed, the vacuum pump is turned on, and a vacuum of 0.8 kgf/cm -2 is created in the autoclave, which should be maintained for 45 minutes; the time is counted after the specified pressure is reached. At the end of evacuation, the autoclave is filled with a solution at a temperature of 5-35 ° C, and the vacuum during the filling of the autoclave should not drop below 0.6 kgf/cm -2.

After filling the autoclave with the solution, the vacuum pump is turned off, and further supply of the solution to the autoclave is carried out by a hydraulic pump under pressure from the working tank.

The duration of the filling process and pressure are determined depending on the size of the workpieces and the estimated amount of sapwood. For example, for pine products the duration of the filling process is 90-180 minutes. at a pressure of 12-14 bar.

The end of absorption of the solution is considered to be the moment when, within 10 minutes. no more than 20 liters of solution per 1 m 3 of wood is absorbed, which is recorded by instrumentation. At the end of the impregnation process, the pressure gradually (within 10-15 minutes) decreases to 4 bar. Next, the working solution is pumped into the shunting tank.

After reducing the pressure, the wood is subjected to reverse evacuation, remaining in the autoclave for 30-45 minutes. The time is counted after the specified pressure is reached. This process is necessary to remove excess impregnation solution from the wood.

The impregnated wood is unloaded from the autoclave and undergoes a fixation process in a closed and well-ventilated area for at least 48 hours. The area must be equipped for the collection of chemical liquids.

With each impregnation cycle, it is necessary to impregnate a sample of lumber for testing in order to remove a sample to analyze the depth of impregnation and the quality of impregnation. After drying the wood, visual inspection of the degree of impregnation must be carried out. The sapwood part of the wood must be 100% impregnated, the impregnation must be continuous and uniform. If necessary, chemical control of the impregnation depth is also carried out using special test kits.

Use of impregnated wood

Antiseptic-impregnated lumber is widely used both in industry and in everyday life.

Impregnated wooden poles widely used as power line supports. Impregnation in an autoclave provides long term service of pillars, and the new generation antiseptics used during impregnation, made on the basis of copper, make such wood harmless to humans and animals, ensuring reliable protection from biological pests.

Impregnated wood is also used in the production of sleepers. To increase the efficiency of impregnation, wooden sleeper blanks are first pricked, which are then impregnated with an antiseptic in an autoclave.

IN last years, in connection with the development of the wooden house-building industry, impregnated lumber has become widely used in this area. Fences, terraces, piers, gazebos, playgrounds are made from impregnated wood; it is used for outdoor and interior decoration premises.

Impregnated deck board ( terrace decking) is a material intended for laying floors in open areas for recreation: terraces, verandas, etc. Terrace boards are used in the construction of stairs, podiums for gazebos and pavilions; it can withstand heavy loads, which allows it to be used as flooring in garages and car lots.

Architectural forms created using impregnated moisture-resistant wood are very practical, because outdoors, even in the harshest weather conditions, the service life of wood treated with an antiseptic in an autoclave is at least 30 years.

Prepared by experts
Wood Protect Technology LLC

English to impregnate(from lat. impregnare) - to saturate, soak.

Impregnated wood- this is wood impregnated with protective antiseptics on water based during deep processing in autoclaves to prevent rotting and other decomposition under the influence of the environment. Antiseptics currently used for wood impregnation do not contain chromium, arsenic, petroleum products or other harmful compounds.

The service life of impregnated wood is practically unlimited.

Oil-containing liquids, creosote, and arsenic and chromium compounds are NOT USED for impregnation.

After treatment, the wood DOES NOT SMELL and DOES NOT SPOIL. It is NOT HARMFUL to the health of people and pets.

Currently, impregnated wood is produced in two shades: greenish and brown.

The impregnation process is carried out in hermetically sealed chambers. Various products wood is placed in a chamber where a vacuum is created in a computer-controlled mode. After this, a special composition is fed into the chamber, penetrating deep into the wood. After a certain time, excess liquid is removed from the chamber and a vacuum is created there again. After finished products removed from the chamber and packaged for shipment to consumers.

When should you use impregnated wood?

Impregnated lumber - non-rotting lumber

In Russian weather conditions environment subjects external wooden structures and buildings to heavy loads. In the presence of moisture, heat and oxygen, ordinary wood rots and quickly becomes unusable. This usually causes significant additional costs, and often can even lead to dangerous, even tragic consequences.

Biological decomposition of untreated wood begins as soon as its moisture content rises above 18%. In practice, in external structures this figure often reaches 20-25%, and in those in direct contact with the ground it even exceeds 30%. For this reason, only impregnated wood products should be used in all exterior wood structures and buildings.

Only impregnated wood (board) ensures compliance with the requirements for wood products used in external structures.

Paints, varnishes and other protective agents applied to the surface of products do not provide effective and long-term protection against rotting. Impregnated wood lasts about 5 times longer than regular wood, and does not require constant updating of the paintwork.

Any time contact is expected wooden structures with soil or water, as well as in places exposed to precipitation, use only impregnated wood!

We offer different kinds materials such as impregnated terrace, impregnated timber, impregnated wood and other types.

Impregnated wood production technology

This method is widely used for impregnation of garden furniture, fences and terrace boards, floors, wooden products for streets, etc., which require a high degree of protection.

The impregnation process, or “vacuum-pressure-vacuum,” consists of several stages using special equipment - an autoclave. As a result of processing, a protective composition consisting of 1-5% antiseptic " Bioneutral W72" ( Bioneutral IN 72 ) analogue of Tanalith E, penetrates centimeters inside the workpiece. However, according to GOST, if a pine product is impregnated by 2-3 mm, then the service life of this product is 30 years. In the first stage of the process, an initial vacuum removes air from the wood cells. Then the chamber is filled with a protective compound. At the next stage, hydrostatic pressure forces the protective composition to penetrate deep into the wood structure. At the next stage, the vacuum removes the remaining protective composition from the surface of the wood. The reduced pressure inside the wood draws the protective compound from the surface.

As a result, the protective components of the preservative are fixed in the wood structure in such a way that they become almost impossible to remove. The wood receives long-term protection.

Wood processing technology in an autoclave:

After processing in an autoclave, impregnated wood does not require additional treatment with paints, varnishes, etc., has several times lower cost compared to synthetic and composite analogues, is extremely practical, and can be used as load-bearing structures. Even impregnated wood completely immersed in water will serve you for many decades! Down with exhausting annual painting in order to somehow preserve the wood!!! Away with all “synthetics” from your home, only natural materials!!! Allow yourself the luxury of using high-quality, environmentally friendly materials!!! If you share our views, contact us, we will find you The best decision for your home or cottage!

Advantages of impregnated wood

Impregnated wood is an excellent construction and finishing material. Unlike thermowood and WPC (Wood-Polymer Composite), impregnated wood can be used not only as a decorative and finishing material, but also as construction material.

Thermowood cannot be used as a structural material because during the heat treatment process it becomes very brittle and becomes very brittle. WPC products containing polymers are subject to severe deformation. WPC products bend and change their shape.

Impregnated wood remains unchanged throughout its entire service life. It is not subject to deformation, like WPC, and does not splinter, like thermowood. Impregnated wood can be used as a building material.

Deep vacuum impregnated wood is actively used in the construction of structures and structures. For example, it is widely used in frame housing construction and road construction. Preserved, non-rotting lumber is used as rafters and joists.

impregnated(preserved) wood is not subject to rotting.

It can be in direct contact with soil and water.

Impregnated lumber does not require additional protective treatment throughout the entire service life.

European manufacturers of impregnated (preserved) wood provide a guarantee for their products for up to 75 years.

The actual service life of impregnated lumber is much longer and can exceed one hundred years.

Unlike thermowood and WPC products, impregnated wood has increased fire resistance.This significantly saves money, time and labor compared to conventional lumber.
Even thermal wood requires treatment with oil or a special compound to prevent cracking.
Impregnated wood eliminates these hassles and troubles.

Impregnated wood is an environmentally friendly material.

Deep vacuum impregnated wood is not harmful to people and pets.

Comparison of impregnated wood with other building materials

Impregnated wood- a grateful and pliable building material. Manufacturers offer a fairly wide range of unplaned and planed boards of different sections and lengths, making working with the material not only simple, but also enjoyable.

Fences

Fences and fences perform a wide variety of functions: they protect from wind and noise, enclose the territory, and protect from the prying eyes of neighbors and passers-by. It is by the fence that, as a rule, the owners of the house are judged. Construction of a fence and a fence is a much more responsible and labor-intensive job than making a flower box or sandbox.

Moorings

IN Lately get acquainted with the pier a large number of Russians. Despite the rapid growth in popularity, the Russian language does not even have an exact term for this structure. Usually people use the words “pier”, “walkway”, “platform” and others, one way or another reflecting the essence of the phenomenon.

We will call them berths, even if their owners are only going to catch perch from them or dive into the water after a bathhouse and do not at all intend to moor to them on ships, boats, yachts, boats and other watercraft.

So here it is. A wisely designed berth significantly expands the capabilities of your own shore and significantly improves the quality of your vacation. When designing a berth, it is necessary, first of all, to choose the right location and type of structure. The choice is greatly influenced by the topography of the coast. After this, you need to understand the dimensions of the future structure and design it. Then you need to worry about purchasing materials. And finally - let's get down to business...

It should be remembered from the very beginning that building a pier will take away some of our valuable free time. But how can this compare with the joy of work and pride in the results achieved? You can, of course, entrust the construction of the pier to specialists. But even in this case, it would be a good idea to check whether they use impregnated wood. Otherwise, in a few years, what was built today will have to be repaired or rebuilt.

1. Deep protection formulations
2. Antiseptics
3. Fire retardants
4. Combined composition
5. Surface treatment
6. Manufacturers' offers

Wood impregnation is the process of saturating natural material solutions and antiseptics in order to acquire the necessary qualities of future products:

• Pest resistance;
• Resistance to wetting, rotting;
• Fire resistance;
• Increasing the strength of wood;
• Increasing the service life of wood.

“Impregnate” in Latin means “to fill.” In other words, the impregnate penetrates the structure of the tree, fills its space, strengthening the material from the inside.

What materials are processed

It is necessary to impregnate materials whose products are exposed to destructive factors:

• Flooring and decking boards;
• Blanks for the manufacture of garden furniture;
• Timber and boards for the construction of canopies, gazebos;
• Boards for fences, etc.

Deep protection formulations

The main requirement for all impregnating compositions is environmental friendliness and safety. Today, responsible manufacturers with a good reputation do not use toxic and caustic solutions for wood processing.

According to their purpose, impregnates can be divided into groups:

• Impregnations for weather protection;
• Fire retardants;
• Combined.

Weather impregnations

Solutions of this type are intended to strengthen the structure of wood in order to improve its resistance to weathering:

• Temperature changes;
• Seasonal climate changes;
• Rain, fog, high humidity;
• Ultraviolet;
• Sunlight, prolonged heating.

These factors rapidly spoil the raw wood. The impregnated board firmly withstands these influences, does not crack, does not dry out, and does not change volume with changes in humidity.

Antiseptics

Biocides included in antiseptics suppress the proliferation of microflora and completely eliminate it; new colonization becomes impossible. It is necessary to impregnate beams and boards of critical structures with solutions of this type:

• Purlins and gaskets for them;
• Floor beams;
• Banding of walls, crossbars;
• Cladding board, etc.

Fire retardants

Fire is merciless for all types of wood. Dry wood, to varying degrees, supports combustion and the spread of flame and smoke, which threatens the person inside wooden house. To reduce risks or completely eliminate this property building materials, components for the construction of structures in residential buildings must be impregnated with fire retardants. These are substances that do not support combustion; they minimize the ability of the material to smoke and allow you to gain time in the event of a fire.

Combined composition

Senezh-type impregnations are in high demand: they penetrate deep into the timber or board, compact the structure and create a protective hydrophobic film on the surface of the product. It does not allow water to penetrate the material. As a result, the product does not lose or absorb water and moisture, and retains its properties in any weather for a long time.

Senezh stops the primary processes of damage by fungi and some types of pests, and has insecticidal properties.

Another feature of the solution is that it protects wood from burning and has fire retardant properties.

Combined solutions are suitable for processing timber and boards for floors, rafters, external and internal load-bearing beams, and wall cladding.

Deep impregnation methods

There are 2 main ways of impregnating timber and boards: deep and superficial. Deep is preferred because the wood is processed throughout the entire volume or most of it.

Deep processing can be carried out using two methods:

1. Dipping. This is a simple method that can be repeated under conditions household on a private construction site. For dipping, no additional equipment is required - only a reservoir with the drug. Wood quickly absorbs impregnates. The degree of penetration depends on the time the workpiece is kept in the solution from 2 hours to a week.

1. Pressure impregnation. For this it is necessary industrial equipment – special installations, in which autoclave conditions are created. Thus, the composition is quickly and deeply absorbed into the wood. It is allowed to use lumber with its own moisture content of 30%.

1. The diffusion method is effective, but little in demand. The bottom line is this: stacks of wood are sprinkled with a mixture of sand and the drug in a ratio of 5:1 and wrapped in film. Impregnation lasts up to 10 days. In this way, lumber can be processed throughout the volume. Low demand for the method determines the long duration of the procedure and the high price finished products. Materials impregnated by diffusion are used for assembling critical structures.

Surface treatment

These are the simplest and at the same time ineffective ways to protect wood. And yet, the methods are used quite often; in many cases, surface treatment is recommended by designers.

1. Painting with solutions with a brush or rollers is carried out on horizontally laid wood - this way the compositions penetrate to a maximum depth of up to 3, sometimes up to 5 mm. It is recommended to paint mounted elements in any plane 2-3 times to achieve a better effect.

1. Rubbing is indicated for stubborn wood with a rough surface that is difficult to paint. The solution is literally rubbed into the surface with thick swabs using protective gloves.

1. Spraying is used only for treating solid facades and floors. This processing method is ineffective - penetration is only 1-2 mm. This is how it is processed hard to reach places structures, individual elements Spray coating is unprofitable due to the high consumption of impregnate.

Manufacturers' offers

Impregnated lumber is produced in Europe and Russia. Basically, processing is carried out by pre-order, but you can buy both blanks and products.

Manufacturers mainly supply boards of the following types:

*The ranges of length, width and thickness of the processed board are indicated in parentheses.

The sizes and prices of products from different manufacturers differ; the table shows the average prices and sizes of products from domestic forest processing enterprises.

The market is dominated by impregnated lumber from Russia and Finland. The difference in quality is insignificant, but the import price is significantly higher than the Russian one.

Attention!

Rimwood. Fire protection of wood with fire retardants.

Wood is wonderful eco-friendly and warm building material, the only disadvantage of which is its rapid flammability.

That is why even at the construction stage wooden structures, and even more so in residential buildings, it is necessary to use fire retardants for wood, which help reduce its flammability and make the material less fire hazardous.

The most effective technologies for protecting wood at present are treatment with fire-retardant coatings and impregnation with special compounds.

Treatment consists of applying a layer of special coating to the surface of the protected material. With this method, the fire retardant is applied with a brush or sprayed onto the surface of the wood; the depth of penetration of the fire retardant into the wood will be insignificant. And even with the warranty stated by the fire retardant manufacturer, the fire retardant cannot provide long-term fire protection for wood throughout the entire service life of wooden structures. It is also worth remembering that, in accordance with the standards fire safety Such surface treatment must be done once every 2 years.

The second method, which is the most reliable and durable wood processing technology, is the method of deep impregnation in an autoclave (impregnation) using vacuum-pressure-vacuum technology. With this method, the fire retardant penetrates deep into the material, the wood becomes protected for its entire service life, turns into a fire-resistant material, does not respond to fire, and after the source of the fire is removed, combustion and smoldering stops.

The RIMWOOD PRO LLC company offers its clients affordable prices both options for treating wood with fire retardants. When processing lumber, we use the most modern technologies and effective flame retardant formulations.

For surface treatment, we use special industrial baths in which the lumber is soaked long time. This method is more effective than conventional application with a brush or roller, as it ensures deeper and more uniform impregnation of the material with fire retardant compounds.

We carry out deep impregnation with fire retardants in special autoclaves. After loading the lumber in the autoclave, a vacuum is created - air is pumped out from the pores of the wood, after which an antiseptic is pumped in and a overpressure, under the influence of which the fire retardant composition penetrates deep into the structure of the wood. On last stage a vacuum is re-created, which extracts excess antiseptic from the wood.

Attention! Be as demanding as possible when choosing fire retardant-treated lumber. Often, unscrupulous manufacturers use the cheapest and most ineffective fire retardants, or simply tint their products pinkish. Remember that high-quality treatment of wooden structures with fire retardants is, first of all, the safety of you and your family.