How to Apply Bitumastic Paint?

Randy Charles
Randy Charles
Professional Painter

Hi, I’m Randy Charles, the creator and chief editor of this site Paintcentric. I’m a businessman now by profession, but I used to work as...Read more

Bitumen Paints, as the name suggests are manufactured with Bituminous materials. Bitument Paints are very handy in fixing any issues relating to any underwater structure, any steel, or ironworks as weather protection, as a waterproofing, anything made of stone and bricklayers, masonry structures, metal-fabrications, any kind of castings, asbestos-cement sheets, etc. Bituminous Paint for a concrete foundation is extremely efficient as a protective layer.

Bituminous materials, which is the main ingredient in Bitument paints are very dark and sticky liquids with great viscosity. That is left behind from the process of crude oil distillation and hence Bitument Paints. Those are available in a liquid or semi-liquid form containing hydrocarbons as its primary content.

What is Bitumastic Paint?

The Bitumastic Paints are a special paint used in building constructions as a protective coating, waterproofing, corrosion-resistance, and damp-proofing. Bitumastic Paints are made-up of Bitumen or coal-tar dispensed in naphtha, a mineral spirit. Bitumastic Paints are also termed asphalt coating. Bitumastic Paint comprises 87% of Carbon, 11% of Hydrogen(H), 2% of Oxygen(O). The usage of Bitumastic Paint depends upon the different forms of Bitumen used; they are as follows:

Can You Paint When It Rains?

What is Bitumastic Paint

  • Bitumen_Emulsion: It is in liquid form that is mostly composed of bitumen in an aqueous medium, dispensed by some appropriate stabilizing agents. Bitumastic Paints with this form of Emulsion Bitumen is used in the liquid medium.
  • Cut-back Bitumen: This is the form in which bitumen is produced from asphaltic bitumen in the presence of some liquid forms of petroleum or coal tar. Bitumastic Paints with this form of cut-back Bitumen is used in chilly weather conditions.
  • Plastic-Bitument: The plastic bitumen comprises bitumen thinner and suitable inert fillings ranging from 40% to 45%. The Bitumastic Paint with this form of plastic bitumen is used for repairing damages in masonry structures and for stoppage of any leakages etc.,
  • Straight Run Bitument: This form of bitumen can be received by distillation to a particular viscosity, which is also used in bituminous paints.

The consumption quantity of Bituminous Paints depends upon the porosity of the surfaces. These Bituminous Paints are variedly applied for Road-construction, in many kinds of hydraulics, and in erosion-control areas, Dam-grouting, Dam inner and outer linings, reservoirs, swimming pools, waterproofing, drainage gutters, etc.,

Pros and Cons of Bitumastic Paints:


  • Bitumastic Paint can be modified using Polyurethane or Acrylic Polymer materials through which their durability and flexibility can be increased.
  • Bituminous Paints are Alkaline resistant and are odor-free.
  • Bitumastic Paints have good adhesive properties to act as an excellent barricade against air and moisture penetration.
  • Bitumastic Paints are considered very advantageous in various applications due to their quality of strongness, waterproofness, durability, and can resist the impacts of harsh chemicals. It can also mitigate the effects of Ultra-violet lights (UV lights).
  • The application of Bitumastic Paint protects the surfaces from rusting.
  • Bitumastic Paints are readily available for usage and do not require thinning before using. It is available in different quantities 1Lit, 2.5Lit, 5Lit, and 25Lit.
  • Bitumastic Paint application can be done with the help of an ordinary paintbrush, roller, conventional or airless spray.
  • Bitumastic Paints are very economical, required minimum time for drying, and are importantly quite easy to use.
  • Bitumastic Paints are applied both above and below water or ground.


  • The application of Bitumastic Paints on some surfaces is not considered the most attractive option, for example, indoor walls.
  • Bitumastic Paints are available only in Black color. Very few are available in green shade but even they are in very dark color.
  • Only after complete drying Bitumastic Paints can withstand freezing weather conditions, but at the time of frigid conditions applying the first time Bitumastic Paint is difficult.
  • Despite the quality, Bitumastic Paints can withstand extreme hot and even resists UV lights, due to which its lifespan is reduced in most hot countries.
  • About certain topcoats, you are very much restricted and have only a few limited options that can be overcoated since most of them will start bleeding through.

What Is the Purpose of Bitumastic Paint?

The most interesting fact about Bitumastic Paint is its versatility. The purpose of bitumen paints is to be used in all kinds of situations. The main purposes of Bitumastic Paints are listed as below:

What Is the Purpose of Bitumastic Paint

  • Bitumastic Paints are commonly used over metals like ferrous and non-ferrous.
  • The main purpose of Bitumastic Paints is to consider the usage in the construction of water-proofings,’ resistance against corrosion, applications in damp-proofing in case of various structural layouts.
  • Bitumastic Paints have a strong-adhesive property and hence act as a successful protective coating on various materials starting from wood, iron, or steel, on different types of masonry activities. Bitumastic Paint for concrete layouts is highly effective.
  • Despite Bitumastic Paints being associated with roofing and flat roofing, they also considerably contribute to Industrial roofing.
  • In addition to application in roofing as a primary purpose, they also play a remarkable role in quick and smart repairs, such as fixing any patchwork or seal cracks.
  • Bitumastic Paints are also used for water-proofing foundations below the ground level since it protects against contaminants and there will not be any odor once it got dried. Black Bitumastic Paint uses in water tanks has the drawback, that it cannot be used in drinking-water tanks.
  • Bitumastic Paints are also used in the process of sealing up wooden porous surfaces. Even it plays an excellent role in adding a layer of waterproofing in the wooden-plyboards.
  • Bitumastic Paints when mixed with other materials like roofing products enable it to plug_up a hole, and seal any surface cracks too.

Bitumastic Paint: How to Apply It?

Let us read further, about how to apply Bitumastic Paint. Before you start applying the Bitumastic Paint, make sure that your eyes and skins are properly protected, and if it is an indoor place, ventilate the area as much as possible. The steps are as follows:

Bitumastic Paint

Surface Cleaning

The secret of getting maximum results in applying Bitumastic Paint very easily lies in proper surface cleaning from all sorts of debris, any rust, or grease. Once the surface is cleaned and dried, start applying the first coating. If the surface is a metal, then use a wire_brush and remove any rust formation. You can also follow other methods using mechanical devices, shot blasting but the only thing to be keen on is, the surface should be well-cleaned before applying.

Apply Thinner for Galvanized surfaces

If it is a galvanized surface, then with the help of etch-primer just rough it up the surface and wire brush to enable the paint to stick properly. Next, for a better result, apply an anti_corrossive primer in the surface first. Next, within the next few hours, after completely dried, apply Anti Corrosive Bitumastic Paint for a good result.

Applying Bitumastic Paint

If the surface area contains numerous porous, thin the Bitumastic Paint about 20% to enable the paint to penetrate through the pores and protect the top surface of the material. Next, you can start applying the paint using conventional methods or using a brush. Whichever method is used to apply the paint, it is mandatory to apply a topcoat with more Bitumastic Paint after 24 hours.

Apply Second coat

After the first coat, four to five hours later, apply the second coat once dried, to have a better result.

How Long Does Bitumen Paint Last?

Bitumen Paint is a durable product. Under ideal conditions, the painting will last for a long time. Whereas, in the case of roof painting, you need to make a tough-up every two to three years to prevent any cracking. You can apply a further coat with sun reflective Bitumen Aluminum Painting to get more durability.

Key takeaways:

  • Bitumastic Paint for waterproofing is considered bliss, it seals cracks in the roof. It is corrosion-resistant and prevents rust formation.
  • Bitumastic Paint is used in water tanks but not recommended for drinking water tanks.
  • It can be used as a protective coat over various materials like wood, ferrous and non-ferrous metals, and concrete layouts.
  • Bitumen paints are available only in black color.
  • There is no need for thinner before using Bitumen Paints, it can be used readily.
  • No special brushes are required for painting these Bitumastic Paint, it can be done in a normal painting brush or spray.
  • Bituminous Paint Price in India is Rs. 53 per liter.


Bituminous Paints are a typical kind of paint and are more commonly used in building surfaces. Because of its nature of resistance and fast drying, these paints are also used in outdoor painting. Being inexpensive and easily available, it would be the most economical choice. Despite various advantages, before you pick this choice Bitumastic Paint just ensure all pros and cons of the product, whether it suits your need.

Randy Charles
Randy CharlesProfessional Painter

Hi, I’m Randy Charles, the creator and chief editor of this site Paintcentric. I’m a businessman now by profession, but I used to work as a painter earlier in my professional career. There is simply nothing about painting that I didn’t do as a painter. From painting a fridge to a multi-storied building, I left nothing. I retired from my painting job in the mid of 2018 due to back arthritis problems.

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