Composition and technical characteristics of bitumen varnish

Because of its resilience and waterproofing qualities, bitumen varnish is a protective coating that is both adaptable and extensively used. It is frequently used to protect wood, concrete, and metal surfaces from the elements and increase their longevity. Bitumen varnish is widely used because of its efficient operation and comparatively simple application procedure.

Bitumen is the main ingredient in bitumen varnish; it is a black, viscous, and sticky type of petroleum. Refined, this natural material is mixed with resins and solvents to make a varnish that applies smoothly with a brush or sprayer. The resultant coating shields surfaces from physical wear, chemicals, and moisture by creating a strong, impermeable layer.

The varnish contains a number of additives in addition to bitumen to improve its qualities. These could include UV stabilizers to stop deterioration from sunlight, drying agents to expedite curing, and fillers to enhance texture. The precise composition may differ based on the intended application; certain formulations are intended for use on particular surfaces or in particular environments.

Bitumen varnish’s technical attributes comprise of its strong adherence to various materials, pliability, and ability to withstand cracking. It can be used indoors and outdoors because it can tolerate temperature changes without losing its protective properties. Moreover, bitumen varnish is renowned for its outstanding coverage, frequently needing only one or two coats to produce a long-lasting finish.

Taking your project’s particular requirements into account is crucial when selecting a bitumen varnish. You should consider things like drying time, application ease, and surrounding conditions. You can make sure that your surfaces are protected and retain their integrity for many years to come by choosing the appropriate product.

Composition Bitumen varnish typically consists of bitumen, a black viscous mixture of hydrocarbons, and various solvents or thinners.
Technical Characteristics Bitumen varnish is known for its waterproofing properties, making it suitable for protecting surfaces from moisture and corrosion. It also provides excellent adhesion to a variety of substrates.

Main characteristics

Bitumen has an oily structure and is a liquid. It is either brown in color or colorless. It is important to use caution when using it. Each of the values listed below relates to the materials that go into making a particular kind of paint.

  • drying time;
  • viscosity;
  • elasticity of the film for bending;
  • consumption on m2;
  • resistance to high temperatures;
  • moisture resistance;
  • Clutch with metal.

The cost of producing bitumen varnish is low. Apply with ease and simplicity. Use a brush or roller for this. There is a good amount of coating. The coating that has formed is uniform and free of defects.

Consumption is contingent upon the material being worked with. An average of 100–200 ml of varnish per square meter is needed for painting. Usage areas:

  1. Painting supports, plumbing, gate and other construction facilities.
  2. Coloring to prevent damage to equipment and structures during operation, transportation and storage.

Bitumen, solvents, and resins are the main ingredients of bitumen varnish, an adaptable coating material. This combination is perfect for protecting concrete, wood, and metal surfaces because it offers superior corrosion resistance, waterproofing, and durability. Its ease of application and quick drying time make it even more useful for home and commercial applications. Knowing the composition and technical properties of varnishes makes it easier to choose the best one for a given application, providing durable and efficient protection for a range of substrates.

Bitumen varnish recommendations

Bitumen varnish needs to be well blended before use. Sometimes you have to add a small amount of solvent. The purported varnish application area needs to be cleaned and allowed to dry.

Anything that could obstruct the painting process should be eliminated, such as any leftover paint, snow, ice, etc. Applying multiple layers of varnish can be done with a roller, brush, or spray application. About seven hours pass between layers.


Bitumen-based varnish is used to shield concrete, brick, and wood structures from water damage. As a result, it is frequently utilized for the durable and dependable waterproofing of homes, garages, basements, sinks, and other structures. It can also be applied as ornamental paint.

Metal is effectively and consistently protected from corrosion by varnish coating. The impact of moisture and air is limited by the thin layer. There is no iron oxidation process taking place.

Strong adhesion to most materials—the ability of one material to stick to another—is another crucial characteristic. It serves two purposes: first, it primes the structure before paint is applied, and second, it acts as an adhesive for roof components that are cold glued. Since bitumen varnish burns easily and cannot be heated, this kind of glue is ideal.

Application in decoupage

Decoupage is a technique used to give products an aged appearance that fits well with a particular interior design aesthetic. Decoupage gives the item a unique, expressive, and relief look. By emphasizing the bulges and darkening the pits, you can achieve the desired effect. Additionally, the designer adds a few surface fissures.

Typically, bitumen varnish is used to age materials. Applying it with a small brush, it is then wiped with a rag or foam sponge to remove any excess or streams before the coating dries. Dimming and highlighting are controlled separately in parallel. Additionally, they give the décor its final look by applying white paint to the appropriate spots to add lightness after it has completely dried. Solvents are used to eliminate surplus.

If the surface is made of wood, the varnish will seep into the crevices, highlighting the tree’s structure. It is utilized to decorate furniture, bas-reliefs, and stucco molding.

It needs to dry for 12 to 24 hours. Alkaline varnish is used to fix the finished product.

Bitumen varnish comes in a variety of brands; the most widely used ones are listed below along with their attributes.


The composition of BT-577 varnish consists of base bitumen, oils, resins, and solvents. The coating has a stunning shine and is black in color. This varnish is applied to agricultural machinery, construction equipment, and metal products. It is frequently applied to a method that advances to the conservation phase. Another product bearing the same name is made by adding aluminum powder to BT-577 varnish.

The substance is applied using roller staining, sinking, dipping, and spraying techniques. Hot drying is also acceptable as long as it doesn’t take longer than a day at room temperature to dry. High strength, elasticity, water resistance, strength against salts, and gasoline resistance define the final coating.

Take note! It’s crucial to exercise caution when working with bitumen varnish because it can catch fire and poison an individual.


Bitumen BT-123 varnish is commonly used to prevent corrosion on metal objects and to shield non-metallic products during long-term storage or challenging transportation. A lacquer film holds its properties for six months in a temperate climate.

The product is most frequently used in roofing and other construction-related tasks.

Its fundamental attributes and traits:

  • resistance to temperature changes;
  • resistance to moisture, a number of chemicals;
  • increasing the service life of products;
  • strength;
  • coating – glossy, transparent, without ospin, bloating;
  • viscosity-17–35 s according to the viscometer of the BI-4;
  • The proportion of the dry residue is 37%;
  • Drying of the coating – 24 hours at room temperature, 20 minutes – at +110 degrees;
  • Consumption – 80–110 g/sq. m.

Standard solvents, such as white spiteen, are used to dilute the product. Before applying the material, it is crucial to remove any dirt, grease, and rust from the surface. The pneumatic pollination method works best, but you can also paint with a brush or try the pouring method. If needed, you can apply a second layer after the first has fully dried.


Among the paints and varnishes that impregnate electrical insulation. Bitumen mixed with alkyd oils, resins, different additives, and sequestics make up the composition. produces a stunning black film on the products’ surface and is used to handle electrical equipment winding. The product is applied with a masking brush or by dipping an object in varnish after being diluted with toluene, a solvent.


BT-95 material is an oil-bonnobitum varnish adhesive that is frequently used for electrical insulation. Vegetable oils and varnish are used in the production process. solvents for the material, such as xylol, solvent, or a combination of them. The product is used not only for these uses but also as an adhesive composition in the making of mycalents.


Bitumen BT-783 varnish is an oil-bitumen solution mixed with vegetable oils and organic solvents such as sequestrants. It serves a specific purpose: to protect internal battery components from sulfuric acid, the material is used to cover the upper battery zone.

Consequently, a coating is produced that has the following characteristics:

  • elasticity;
  • strength;
  • hardness;
  • electrical resistance;
  • resistance to temperature drops.

Use a brush, spray, or a diluted solution made with white spirit and xylolom to apply the product. Temperature in the working area when applying +5… +35 degrees determines the drying time of the day.

Certification of goods

Based on the kind of solvents used in their composition, varnishes can be categorized into multiple broad groups, including alcohol, turpentine, and oil. Every one has unique qualities and uses.

The presence of a certificate of conformance on varnish is merely recommended in our nation. It is only necessary in very few circumstances. However, a declaration of conformance ought to be included with every paint and varnish. What distinguishes them? The certificate of conformity states that the declarant and the certification body share informational accountability. The declaration states that only the certifying authority bears accountability.

It is not required to prepare a certificate of conformity for a bit of bitumen before releasing it for sale within Russian Federation borders. However, in the event that the products are involved in state transactions and tenders, this document is required. It improves the varnish’s ability to compete in the market. State certification centers use laboratory tests as the foundation for issuing certificates. It is necessary to draft the document beforehand.

A certificate of conformance attesting to the superior quality of the product helps the varnish become very popular with both novice and expert consumers.

Because of its special qualities, bitumen varnish is a very adaptable and strong material that is frequently used in a variety of applications. This varnish has good waterproofing and protective properties and is mostly made of bitumen, a byproduct of petroleum refining. Because of its capacity to create a hard, glossy finish, it can be used in both industrial and domestic settings and provides a dependable means of shielding surfaces from environmental damage and moisture.

What makes bitumen varnish unique are its technical features. Because of its high level of adhesion, it adheres well to a wide range of surfaces, such as concrete, metal, and wood. It is therefore especially helpful for maintenance and construction projects. Additionally, because of its resistance to salts, acids, and alkalis, it can endure harsh environments without degrading, extending the life of the materials it coats.

Bitumen varnish application is simple and usually requires little surface preparation. Depending on the project’s need and size, it can be applied with brushes, rollers, or spray equipment, giving you flexibility. After application, it dries fairly quickly, creating a strong layer that offers protection for an extended period of time. Because of its strong protective properties and ease of use, bitumen varnish is a popular option among professionals.

In conclusion, bitumen varnish is a useful and efficient material for a variety of applications requiring protective coatings. Its technical features offer durability and ease of application, while its composition guarantees strong performance against environmental factors. Bitumen varnish is a dependable way to protect surfaces from wear and damage, whether it is used for home improvement or industrial purposes.

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Daria Yakovlev

Interior designer, author of online color design courses. I will help you create a harmonious interior using color.

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