Probably, everyone can recall a similar case for themselves, that during the repair period, more than once, due to their own inattention, they forgot to close the can of paint, from which the material, to great disappointment, froze and was no longer suitable for use. The following are examples of possible paint thinners to help you salvage hardened paint, or simply thin new paint.
Oil paints, by themselves, can be both thickly rubbed and immediately have the consistency required for their application. Paints, conditionally called "thick", in this form are used extremely rarely, most often they are diluted with a solvent. Also, already dried paints or those that are planned to be used as a primer are diluted with this specific liquid.
The type of solvent for the paint is determined according to the properties of the material on which the paint will be applied.
Oil paint is easily diluted with many chemicals that are extremely easy to purchase at hardware stores. Examples include the following solvents: turpentine (purified or not), gasoline, solvent 647 kerosene (only with the addition of a desiccant), white alcohol. However, white spirit, thinner 647 and turpentine are by far the most widely used types of solvents.
The scope of the same white spirit is extremely large. It is in serious competition with turpentine, whose sales turnover fell after white spirit appeared on the markets.
white spirit for oil paints used in such cases:
- For obtaining organodispersions when diluting paint and varnish coatings.
- For the purpose of breeding varnishes, primers, drying oils, enamels, car preservatives, etc.
- It is used for washing brushes after work is completed.
- In order to degrease the surface, if this kind of problem suddenly arises.
- Can be used as a solvent for rubber or alkyds.
Such a solvent is extremely popular due to its availability, because its price is quite acceptable, even considering its wide range of applications.
When using white alcohol, the cost of paint or another type paintwork significantly reduced, but the quality of painting remains unchanged.
If desired, it is even possible to find a type of white spirit that does not have a pungent odor characteristic of it.
Rules for using white spirit for oil paints:
- Do not forget about safety precautions, so you should avoid finding solvents near any sources open fire or cutters. It is also worth paying attention in advance to the fact that solvents of some compositions can ignite spontaneously under the influence of temperatures.
- You also need to pay attention to the rather pungent smell of the substance. Therefore, it is necessary to dilute the paint only in well-ventilated areas or even in the open air.
- Due to the chemical composition of solvents, they should not be allowed to come into contact with the skin or mucous membranes. Otherwise, immediately rinse the site of contact with water. Clothing can also be damaged by exposure to a strong chemical.
Turpentine is currently a popular means for diluting paint. In addition, it is used in the production of rosin, as well as dammar. It can also be found in copal-based polishes. The composition of turpentine is complex, and in itself it is like essential oil.
Types of turpentine for oil paints:
- Pneumatic turpentine. It is made mainly from bark. coniferous trees, as well as stumps.
- Wood turpentine. In the manufacture of used branches and bark of trees, which contains resin. In its original form, such turpentine is a brownish liquid that disappears immediately after repeated processing.
- Turpentine turpentine. This type of solvent can only be compared with real essential oil, since it is obtained by distillation of resin and resinous materials of the most different types coniferous trees. The valuable properties of this oil are not lost even after its secondary processing, which is its undoubted advantage.
Solvent 647 is a fairly strong colorless chemical that tends to ignite easily and also exudes a pungent bad smell, which is quite typical for of this type solvents. Often this liquid is used to dilute alkyd enamels and pentaflatein enamels. They often dilute varnishes or putty. The solvent is pre-degreased surfaces that need to be painted. Various industrial tools and parts are also washed with this liquid, and in addition, solvent 647 is used to clean contaminated fabric.
When diluting the paint, one should be extremely careful in its solvent ratio, since the paint can easily be spoiled if the wrong amount of solvent is used. In diluted form, the paint is used for better penetration into the surface material. A mixture of paint with a solvent is also used as a primer.
Mix it well for 10-20 minutes until smooth.
Table. Physical and chemical indicators of the solvent 647.
Today, drying oil is considered a universal solvent. It is also part of the paint, thanks to it, when the paint is applied to the surface, a thin film is formed.
The type of drying oil that should be used depends directly on what type of drying oil is contained in the composition of the paint itself. In addition, all oil paints are classified and its other components, it may include various pigmenting substances and fillers. If the composition of the paint includes only one component, then the name of the paint is given precisely by the name of this very component.
The name may also contain the number 2, which means that the paintwork material is applicable to all surfaces if the paint is diluted with the same drying oil that is included in its composition.
For paint types of drying oil there is also a special classification:
MA-0.25. Indicated on the packaging. Such a mark indicates that the composition of the paint includes harmful toxic substances that can have an adverse effect on health, as well as exude a characteristic odor. for a long time after the coating has dried.
MA-0.21. Paints based on natural drying oil. Percentage: 96% natural oils(soy, sunflower, flax oils) and 4% desiccants. It is mainly used for painting walls, windows, doors, both outside and inside the room.
GF-0.23. Haliftal drying oil - a substitute for natural.
PF-0.24. This is how the pentaphthalic drying oil is marked. It contains a desiccant or glycerin. 50% natural materials.
In accordance with the standards, the packaging should indicate which solvents should be used with this type of paint, as well as its consumption per 1 square meter when applied in 1-2 layers.
Oil paints are the most durable and long-lasting coating among other paints and varnishes.
They are great for applying to plaster, metal, concrete and wood. Same way this coating protects the surface from such harmful phenomena as corrosion, rotting, protects from excessive moisture. In addition, this type paint and varnish products also used as a primer base and has a decorative value. They are brighter, and, of course, can be used not only for painting the walls outside the house, but also inside it.
They are indispensable for creative people, after all, this is how, often, masterpieces are created visual arts. So another plus in favor of oil paints can be considered their prevalence and applicability in absolutely different areas life.
Before you decide on the choice of how it would be better to dilute the paint, you need to decide for yourself what exactly you should buy. Maybe a solvent, maybe a diluent. Solvents are best used in cases where the paint simply froze and dried. After adding it, you need to wait a while, from a couple of minutes to a couple of hours, so that the paint acquires the consistency you need. Then you can work with the material without problems. And in the case when the paint has thickened, it is better to use a thinner. With it, you will also give the paint the desired consistency, since such substances reduce the viscosity of the paintwork composition.
related materials
Water-repellent additives
An actual problem when using concrete and brick is their waterproofing coating. This is due to the destructive effect of moisture on building objects and materials. Changes in air humidity, increased or decreased content of water and its vapors in environment can lead to a number of undesirable consequences.
The issue of removing oil paint today is of great relevance, since this kind of problem occurs in almost every case. cosmetic repairs. An activity like removing paint can either be a matter of ten minutes for you, or it will appear to you more like a curse, taking hours of precious time, effort, and often money from you. Removing oil paint from walls is the most time-consuming process, and especially in cases where the paint is applied over plaster or concrete. However, if you nevertheless decided on a new painting, then the simplest, and therefore popular methods for removing oil paint from surfaces will be given and considered below.
Each artist has his own unique technique that allows him to create real works of art. However, in order to transfer all your thoughts and creative ideas on paper, you need to choose the right colors. After all, the point here is not only a harmonious combination of colors. Important to find paints and varnishes to save your work for years to come.
It will not be a secret for anyone that oil paints are the most popular view colors among artists. Many of them consider oil paints to be the most perfect and worthy means of displaying the beautiful surrounding world.
We bring to your attention a review article on the composition of paints, their advantages and thinning methods.
Composition of artistic oil paints
As a rule, oil paints are applied to the canvas in a diluted form. For this purpose, special diluents are used, in particular linseed oil or turpentine. This tool added to the paint with a brush or palette knife.
Oil paints consist of coloring pigments and oil, which is a binder.
The pigment enriches the paint with color and serves as a thickener. This substance is an ordinary powder, so it cannot be applied to the canvas without additional element. In order for the paint to acquire the desired consistency, the pigment is mixed with vegetable oil(traditionally, linen).
How are oil paints diluted?
On the initial stage thinner is recommended to thin the paint. It often consists of the same parts. linseed oil and turpentine. As a result, the resulting mixture allows the paint to dry fairly quickly. Thanks to its use, no layers of paint do not crack.
Thinner for oil paints
Flax oil is at the same time integral part oil paints and thinner. Due to exposure to air, it oxidizes, allowing the paint to dry. By adding linseed oil, you can achieve an effect in which the layers of paint become more shiny and transparent.
Due to the fact that oil paint dries rather slowly, artists achieve the desired transition of colors.
The amount of oil contained in the paint determines how quickly it can dry. Linseed oil does not evaporate during drying, so it must be added in moderation.
Turpentine is also able to dilute oil paints, but it acts on them in a slightly different way. In the process of drying, it evaporates, so the layer of dried paint cracks. This substance is used for faster drying of paints. In addition, due to dilution with turpentine, oil paint looks matte.
When to add solvent
Before applying paint to the surface of the canvas, oil paints must be brought to a certain consistency. If you dilute the paint more, it will be more transparent, and the pattern and texture of the canvas will become clearly visible.
The ability to apply light transparent smears is distinguishing feature oil painting.
How to dilute paints
Thinning paints with a brush is very easy: a clean brush is dipped into the thinner and then transferred to the paint on the palette. Circular uniform movement mix the paint and thinner until a homogeneous consistency is formed. This action is repeated until the required ink density is reached.
To dilute paints with a palette knife, you need to do the following: dip the tip of the palette knife into the thinner, and then mix it with certain color paints on the palette. As a result, the blade will be a flat ball to slide across the canvas. If the paints spread, they must be collected with the edge of a palette knife and mixed until they become sufficiently viscous and uniform.
The use of oilers
As a rule, oilers are combined with a diluent. These devices are both single and double. Usually, a mixture of turpentine and linseed oil is poured into the first type of butter dish. The second type is used for mixture and pure turpentine. Both types of thinners make it possible to achieve an interesting effect in oil painting. Thanks to a special clamp, the oilers are fixed to the palette.
The use of turpentine
Turpentine can also be used to thin oil paints, but it is still not recommended for this purpose. This tool is great for cleaning brushes, palettes and palette knives from paints. It must be remembered that after drying, the oil paint becomes very durable, so the tools should not be allowed to remain in the paint at the end of the work. To do this, it is necessary to remove all traces of paint from the brushes, palette and palette knife.
Poil benefitssbeautifulOK:
- Thick and pure colors. These paints are easily mixed, thanks to which you can get almost any desired shade and color, regardless of whether it is dark or light, bright or muted.
- Unlike acrylic, oil paint remains wet on the canvas for a long time. This allows you to mix desired colors right on the picture.
- These paints can be applied directly on top of each other in several coats. At the same time, the paints do not become cloudy, as happens with watercolors.
- Not less than important feature oil paints is that in working with them it is very easy to correct the mistakes made. This type of paint is easily removed from the surface of the canvas using different instruments. For these purposes, you can use a palette knife, spatula or a regular cloth. If the layer of oil paints is already dry, a new layer can be applied on top of it.
To apply oil paint to a surface, it is sometimes necessary to obtain a more liquid consistency, so it becomes necessary to dilute the composition. Also, this procedure will be required in cases where the solution was left for some time in a leaky container, which led to its hardening. To dilute the mixture are used various substances, which are selected based on the purpose of the paint.
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When choosing a solvent, pay attention to the purpose for which the paint is intended. The fact is that this type of material includes two large groups divided by area of application:
1. Solutions used for painting surfaces of residential or commercial premises. For these purposes, traditional compositions are suitable, which are presented in abundance on the shelves of hardware stores. Although in recent times demand for these products has declined certain situations an oil solution may be the best solution.
It is necessary to dilute such a mixture in the following cases:
- The material is too thick.
- You need to lay the base layer.
- Painting is done on wood. A not too thick composition fits well on such a basis, otherwise it will not be possible to achieve strong adhesion.
In order to qualitatively apply oil paint with an airbrush, it must first be diluted In addition, it often happens that after use a part of the paint remains, which even in a short period of time has time to dry. This is what dilution is required for.
2. Artistic oil paints. They are great for amateur or professional drawing, as well as painting interior compositions. It is necessary to dilute such compounds with more care, therefore special diluents are selected for them.
Thinner for painting surfaces
As a solvent for external and internal coloring can be used available materials. Their choice is quite large.
This composition has a steady popularity in the breeding of coloring products. For work with oil solutions the following types are used:
- Woody. It is made from the bark and branches of trees, containing resin in abundance. The initial solution is dark, but after processing it becomes transparent.
- Turpentine. It is obtained by distilling the resins of living coniferous trees and is an essential oil. It has many positive properties, so its area of \u200b\u200buse is much wider than its use as a solvent.
Attention! The mixture has a specific smell, so it is recommended to work in a ventilated area.
Turpentine can be successfully replaced with white spirit. The demand and popularity of this product is due to its wide distribution and availability. In addition, there are varieties on sale that do not have a sharp unpleasant odor.
The process of working when using such a composition is very convenient. The mixture does not evaporate as quickly as other solvents, allowing you to paint without haste. Also, white spirit, when added, does not change the color of the composition.
Ordinary white spirit has a low ability to liquefy, therefore it is better to purchase purified Solvent
Such a thinner for oil paints has the number 647. The product designation may be different and depends on the components included in the composition. It is not recommended to use solvent number 646 due to the presence of acetone in it.
It is not always easy to dilute oil paint with this substance: excess leads to a deterioration in the properties of the product.
Gasoline and kerosene
These options are recommended to be used in the absence of other mixtures and only for outdoor use. A significant drawback of the solutions is a specific odor that can cause dizziness and poisoning. This is due to rapid evaporation. But kerosene is best solution when it is required to dilute the old composition, which has had time to thicken greatly.
Drying oil
it universal solution, besides drying oil is a part of oil paints. But it must be borne in mind that the diluent must correspond to the type of substance that is included in coloring material.
For getting necessary information you need to pay attention to the labeling of mixtures for painting. The following designations are distinguished:
- PV-024. Such products are made on the basis of pentaphthalic drying oils.
- MA-021. The composition includes natural drying oil, which contains more than 95% vegetable oils.
- GF-023. Produced with the addition of glyptal drying oil. It is a natural alternative.
The correct definition of the components helps to obtain the desired result.
Drying oil “Oksol” consists of 55% natural oils, 5% desiccant, the rest is white spirit; in its properties, “Oksol” practically does not differ from natural drying oil, but its cost is much lower Dilution order
Equally important is the process of diluting the paint with your own hands, because its exact implementation is a guarantee of the absence of further problems.
The events are held in the following order:
- The container with paint is opened, the density is estimated and thorough mixing is performed. To do this, use an improvised tool or a prepared clean stick.
- The required proportion is determined. For each solvent, the indicator may be different. Exact amount substance depends on the thickness of the paint, but should not exceed 5% of the total mass. Although, if necessary, to obtain a mixture for the base layer or primer of the walls, the volume of white spirit and drying oil can reach up to 10%. To dilute the mixture the best way, the diluent is added directly to the jar. It should be poured in gradually in small portions. This will restore the composition and stir it well.
- Next, the paint is poured into containers for work. During the staining process, the material may thicken, so you need to periodically mix the solvent.
It is more difficult to dilute paint that has stood open for a while. Work order:
- The film that has formed on the surface due to exposure to oxygen is carefully removed. It is impossible to leave or mix it, then it will be impossible to completely get rid of hard lumps.
- A small amount of kerosene mixed with white spirit is poured into the container, everything is well mixed. If required, more diluent is added.
- Then you can stain with this mixture or wait until the kerosene has evaporated and use only one component for dilution.
Important! Work is carried out with increased precautions, since oil paint and all substances used for dilution are flammable and toxic.
Dilution of artistic paints
Drawing materials can also be of different thickness, which requires bringing them to the desired consistency. In addition, the mixture is applied to different surfaces(wooden, fabric). Therefore, for oil art paints, a different approach and a list of dilution agents are required.
Thinners for artistic paints: linseed oil, pinene, multi-component composition "tee" Such compounds can be diluted with the following substances:
- Oil. Purified hemp, sunflower or flax oil is suitable for the process.
- Pinen. Its other name is "Thinner No. 4".
- multicomponent mixtures. It can be a double and a tee: the first contains varnish and oil, and the second has pinene added to them.
It is recommended to choose the material solely from your own preferences, this will achieve the desired result. That is why such paints are diluted in proportions that are determined individually after several samples. But it is worth remembering that excess solvent can destroy the structure of the coloring material.
How to dilute oil paint for application with different tools
The use of different tools for painting walls, ceilings or other bases involves diluting the composition to the desired viscosity level. At home, this parameter is determined using simple device- a viscometer, which can be purchased at the store.
The device is a funnel with a nozzle that can be different sizes. Based on the time period for which the poured composition will flow through the hole, the viscosity level in seconds is determined.
The process looks like this:
- After adding the solvent to the paint container and stirring, the viscometer is immersed in it.
- A stopwatch is prepared in advance. You can use any other device.
- The device is removed from the composition, at the same time the timer is turned on.
- After the mixture completely frees the glass (funnel) of the device, the stopwatch turns off. The value is fixed.
To paint the surface with brushes and a roller, the viscosity should be at the level of 10-15 seconds, and for the spray gun - 25-30 seconds, depending on the model.
After the construction works often remains underused oil paint. Over time, it changes its properties, becomes thick or completely freezes. And the question arises: how should oil paint be diluted so that you can work with it again?
You need to dilute with what is in the base of the paint Dilution features
The basis of oil paint is a pigment mixed with drying oil to a homogeneous state. While the mixture is not used, the heavy powder pigment can settle, the middle hardens, and oil accumulates on top, so it is necessary to carefully stir or shake the jar before use. If it is necessary to bring the dye to a more liquid state, first answer two questions:
- How are you going to use the thinned paint: by itself to paint the surface or as a primer?
- What type of drying oil is mixed with the composition?
It is important for us to decide on these points, since oil paint should be diluted with a substance similar to that in the composition.
If the jar with the paint and varnish material stood for a short time after opening, then the thickening is eliminated by adding drying oil. However, this substance differs in the method of manufacture, so if you choose the wrong one, you risk spoiling the entire coloring material. When it is necessary to reanimate heavily compacted paint, a solvent is indispensable. We also add it if we prepare the primer.
Types of drying oil in oil paints
One type of paint can be used for indoor surfaces, the other - strictly for external works, because it has toxic emissions (pungent odor).
The method of application depends on the type of drying oil:
- The first includes natural drying oil, produced from hemp, linseed, soybean oil. It is marked MA-021, and it is suitable for painting windows, doors and other elements of the premises. The exception is the floor and ceiling, because oil base does not allow moisture to pass through, thereby disrupting the correct air exchange in the room.
- The second type is a composite drying oil created by mixing solvent and oil. Such, white spirit, gasoline, solvent, it is characterized by the presence strong odor and fumes are harmful to the body. Although paint costs less with a similar composition, it is contraindicated to do home repairs with it. Designated by marker MA-025.
After reviewing the label and composition, choose either a drying oil based on linseed oil, or buy a suitable solvent.
Drying oil process
It is not difficult to thin the paint, but it is worth proceeding in stages and economically pouring in any thinner, because if it is oversaturated with drying oil, then it takes a longer time for the surface to dry.
Breeding steps:
- for the convenience of stirring and eliminating clots, we shift the paint and varnish substance into a suitable container;
- Pour in the drying oil in small portions and begin to mix thoroughly, watching the density;
- repeat the procedure for adding oil and bring the mixture to a suitable consistency for us;
- We wait ten minutes, after which we filter the composition through a sieve to eliminate lumps.
If you add too much drying oil, the paint will dry much longer. Choice and use of solvents
Before choosing a solvent, keep in mind that some substances can change the properties of the paint. Basically, either multicomponent ready-made mixtures with numbers (for example, "Solvent 647") are used, which contain alcohols, ketones, ethers, or organic substances with a high degree of volatility (white spirit, turpentine, kerosene, gasoline, etc.) d.).
Add thinner carefully and little by little, so as not to spoil the composition, since an excess can cause the destruction of the bonds between the pigment and drying oil.
Types of organic solvents:
- White spirit is the most used agent, which allows both cleaning brushes and degreasing surfaces, as well as diluting oil paints, drying oil, varnishes. It should be borne in mind that ordinary white spirit has a low ability to liquefy, therefore you need to buy purified;
- Turpentine obtained from various materials woodworking is one of the popular substances to bring dried paintwork materials back to life. A mixture is prepared on the basis of turpentine and white spirit, taking each substance in a ratio of one to one. Or use purified turpentine, which helps speed up the drying process. If you take the unrefined, then the time, on the contrary, increases;
- Kerosene can also be used to thin dried paint. But before that, it is mixed with turpentine or with desiccants. Kerosene is not very popular because it lengthens the drying time of the painted surface;
- Gasoline can be used as a thinner to reduce the viscosity of the ink. It also gives the mixture a haze.
Purified white spirit has a better ability to liquefy, unlike ordinary Before choosing a method for the rehabilitation of oil paint, you need to decide what exactly to purchase - a solvent or a thinner? You will need a solvent for long-standing and hardened paints. When adding it, you need to wait a few minutes or hours until the consistency becomes workable. If the mass has become thick, then a ready-made thinner or drying oil will help you. It reduces the viscosity of the composition.
In painting and construction important role plays thinner for oil paints. Suitable for watercolor or gouache plain water. Some paints do not need to be diluted at all. But for oil enamels, additional special compositions are needed. They have different properties and functions.
Why do we need solvents for oil paints?
Artists have a special water-soluble oil paint, but it is not suitable for construction. Why you need to dilute ready-made formulations? The basis of oil paint is a pigment that is mixed with drying oil. If the enamel is not used for a long time, then the harder particles settle and the oil layer remains on top.
Before use, the jar must be shaken thoroughly. Sometimes it is necessary to make the paint more liquid or wash out the thickened one. In this case, solvents are used. But you need to take into account the fact that the compositions of oily enamels are different. Each uses certain kind drying oil, which acts as a solvent.
Choice of solvents
Paints are divided into two types, used indoors and for outdoor use. This separation comes from the fact that some compounds have a strong odor due to toxicity. There are several types of drying oil:
- Natural - made from soy, linseed or hemp oil. Such drying oil is marked MA-021. Oily enamels based on it are suitable for painting doors, windows and other interior parts of premises, excluding the ceiling and floor. Application to these surfaces disrupts the air exchange in the room and prevents the passage of moisture.
- Composite (or combined) drying oil - is made by mixing oil with a solvent. Designated MA-025. Ready mix can be diluted with gasoline, turpentine, white spirit. Such enamel has a strong smell, and its fumes are harmful to health. Not suitable for indoor use.
- Artificial drying oil replaces the natural one and is designated GF-023.
- Pentaphthalic oil consists of real oils with the addition of a desiccant, glycerin and phthalic anhydride. This drying oil is designated PF-024.
To properly dilute oily enamels, you need to familiarize yourself with their composition, and then select the appropriate solution that matches the type of drying oil. On packages with paints it is always written which solvents are suitable for this product.
Varieties
Thinners for oily enamels are chemical substances, which are supplemented with formulations to achieve a more liquid consistency. The three main solvents are:
- White Spirit;
- solvent 647;
- turpentine.
White spirit is a universal thinner. It is used more often than other means. And now this diluent is made odorless. The cost of white spirit is low, so it is available even to a simple man in the street. When used, the consumption of oil paint is greatly reduced, but this does not affect the quality of the coating.
Solvent 647 is a colorless liquid with a pungent odor. This product is flammable. Indoors it is used as a dilution of alkyd and pentaphthalic paints. Thinner 647 can be used for varnishes and fillers. At the same time, the product can be used as a primer.
Turpentine - has long been used as a dilution. This is a tool that is obtained after processing resin, wood, and other materials. Turpentine is a specific essential oil with a very complex chemical composition. There are three main types: woody, stump and turpentine.
Two more agents are used as diluents. Kerosene restores old dried paints well. But in this case, turpentine must be added. Drying is long - ten days. After diluting the paint with gasoline, the resulting composition will give a matte finish.
Correct use
Before diluting oil paints, you must read the instructions. All solvents are volatile, so they should not be kept near fire, switches, knife switches. Due to the explosive nature of thinners, do not smoke during their application, as well as during the mixing process. At low temperatures Enamel dissolvers may freeze.
Some have a rather unpleasant pungent odor. Therefore, oil enamel should be diluted only in ventilated areas or on fresh air(unless it's cold). Otherwise, you can easily get poisoned by toxic fumes.
All thinners are strong chemicals. If they come into contact with open skin or mucous membranes, then these places should be urgently rinsed with plenty of clean water. cold water. Some solvents can even damage clothing.
When diluting oil enamels, you need to be very careful with the proportions. Incorrectly selected parts can simply spoil the mixture. Correct Proportions are always specified relative to each solvent. They are sold already with instructions for use.
Solvents are used not only to dilute thickened paints. Turpentine, white spirit and others are also used for fresh formulations. Solvents not only dilute mixtures, but also degrease them at the same time. With the help of diluting agents, a good primer is prepared.
Oil enamels are very popular, as they are very beautiful, affordable and well protect the surface from moisture, decay, corrosion. Even if the composition is very thick, you can always use thinners.