Three Types of Bitumen Coating

Is your roof in need of service? In other words, does it leak during thunderstorms and hail? If your reply is in the affirmative, you’ve landed at the right place.

Formulating and applying bitumen is an intricate task: It is viscous, black, and sticky material obtained from crude oil distillation. Bitumen coatings play a crucial role in safeguarding structures against moisture, corrosion, and other environmental factors. These coverings are used in various industries, such as construction, manufacturing, transport, etc.

Typically, three types of bitumen coatings are available in the market:

  • Hot Applied
  • Cold Applied
  • Pre-Formed Membranes
  1. Hot Applied Bitumen Coating

Hot applied bitumen coating, also known as hot mopped coating, is one of the oldest methods of waterproofing surfaces. In this process, bitumen is heated to high temperatures for better fluidity and easy application. It is applied onto the surface with brushes, rollers, or spray equipment. Once the bitumen cools down and solidifies, it forms a durable and water-resistant layer.

Hot applied bitumen coatings are used for built-up roofing systems, where layers of bitumen-saturated felts or fabrics are alternated with layers of bitumen to create a waterproof membrane. These top-covers are made from concrete, metal, and other resources. Hot bitumen can expand and contract without compromising its waterproofing capabilities.

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  1. Cold Applied Bitumen Coating

Cold applied bitumen coatings offer a convenient and user-friendly alternative to hot applied coatings. These coatings do not require heat; they can be applied at ambient temperatures, simplifying the application process and reducing safety concerns. Cold applied bitumen coating is available in liquid form; it is applied with brushes, rollers, and spray. This coating comes pre-mixed with additives to enhance adhesion and flexibility. Cold applied coatings are applied in foundations, basements, and below-grade structures. Moreover, pipeline and tank coatings are protected against corrosion and assets. Cold applied coatings have the ability to adhere well to various surfaces, including concrete, metal, and wood.

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  1. Pre-formed Bituminous Membranes

Pre-formed bituminous membranes are factory-manufactured sheets or rolls of bitumen combined with reinforcement materials such as polyester, fiberglass, or polypropylene. These membranes offer a convenient solution for waterproofing extensive areas quickly. These coverings come in various forms, including self-adhesive membranes, torch-applied membranes, and mechanically fastened membranes.

Self-adhesive membranes feature a built-in adhesive layer protected by a release liner. These membranes can be applied to the substrate by removing the liner and pressing the membrane onto the surface. Torch-applied membranes require heat to activate the bitumen, which adheres to the substrate as the membrane is rolled out. Mechanically fastened membranes are secured with mechanical fasteners like screws or nails.

Pre-formed bituminous membranes are used in roofing, plaza decks, and below-grade applications. They provide a consistent and controlled thickness, ensuring uniform protection across the entire surface. These membranes are renowned for durability, puncture resistance, and ability to accommodate structural movements without compromising their waterproofing capabilities.


Bitumen coatings offer versatile and effective solutions for waterproofing and protecting various structures and surfaces. The three primary types of bitumen coatings – hot applied, cold applied, and pre-formed bituminous membranes – cater to different application needs and scenarios. Whether it’s providing seamless protection on roofing systems, safeguarding foundations against moisture intrusion, or creating a robust barrier for pipelines and tanks, bitumen coatings continue to play a vital role in maintaining the integrity and longevity of structures across diverse industries.

Contact Lakhwa Chemical Services for an effective bitumen covering. We’re the best in the business!

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