Blown asphalt is one of the most reliable materials for waterproofing, insulation, roofing, and many industrial applications. At the start, it is very important to know that ATDM, a trusted supplier of bitumen from Iran and the UAE, provides high-quality blown bitumen and oxidized bitumen to global markets. Because this material goes through a special air-blowing process, it becomes harder, more heat-resistant, and more stable. Google prefers content that clearly teaches users, so this guide explains what blown asphalt is, how it works, why industries use it, and which grades are the most important for real projects.
Blown asphalt is a modified type of asphalt produced by blowing hot air into bitumen at high temperatures. This process changes the structure of the material and makes it:
Stronger
More heat-resistant
Less sticky
More durable
More stable over time
Because of these improvements, blown asphalt performs amazingly well in construction, waterproofing, and manufacturing industries.
Oxidized bitumen is another name for blown asphalt. Many countries use both terms. The two products are exactly the same—just different names used by different industries.
Blown bitumen= common in road and roofing industries
Oxidized bitumen = common in construction, waterproofing, and industrial applications
Both describe bitumen that has been treated by blowing air through it at around 240°C to 300°C.
Production is simple but must be extremely controlled. First, normal penetration bitumen is heated inside a reactor. Then, hot air is injected for a specific time until the material reaches the required:
softening point
penetration value
viscosity
This chemical reaction is called oxidation, which is why the second keyphrase is “oxidized bitumen.” When the reaction finishes, the product becomes stable and ready for industrial use.
There are many reasons, and each one helps projects last longer and perform better.
✔ Excellent Heat Resistance
Blown asphalt does not melt or flow easily in hot temperatures. Therefore, it performs very well in warm countries and exposed rooftops.
✔ Better Aging Stability
Its molecular structure becomes stronger during oxidation. Because of this, it lasts much longer than normal bitumen.
✔ Perfect for Waterproofing
It creates a flexible yet strong seal that blocks water completely.
✔ Strong Adhesion
Many adhesives and mastics depend on blown asphalt to achieve long-term bonding.
✔ Works in Many Industries
Roofing, waterproofing, paints, adhesives, pipe coatings, and chemical industries all use oxidized bitumen.
Below are the most commonly used grades worldwide and their clear advantages. This section helps customers select the right grade for their application.
One of the highest-grade oxidized bitumen products.
Applications:
Premium roofing membranes
High-quality insulation boards
Advanced pipe coatings
Protective industrial layers
Strength:
It offers ultra-high softening point and long-term durability.
A very popular grade used in waterproofing and roofing.
Applications:
Roofing sheets
Pipe wrapping
Waterproofing membranes
Industrial bridges
General insulation
Why it works:
It offers a good balance of flexibility and hardness.
This is one of the most demanded industrial grades.
Applications:
Sealing compounds
Adhesives
Mastics
Joint fillers
Protective coatings
Main advantage:
It keeps its shape even under high temperatures and heavy loads.
A harder grade suitable for high-performance roofing and flooring.
Applications:
Roofing felt manufacturing
Industrial flooring
Heavy waterproofing
Chemical-resistant coatings
Why customers choose it:
It provides very strong hardness and thermal stability.
Designed for extremely hot environments and heavy industrial use.
Applications:
High-temperature mastics
Adhesives
Rail and bridge industries
Foundry applications
Key benefit:
It performs amazingly in extreme heat while remaining stable.
Here are the industries that depend most on oxidized bitumen:
● Waterproofing Systems
Basements, foundations, and roofs need strong waterproofing, and blown asphalt delivers excellent sealing strength.
● Roofing Membrane Manufacturing
Roofing felt and asphalt sheets rely on blown asphalt to resist heat and prevent melting.
● Road and Construction
Some hot-applied asphalt mixes require oxidized bitumen for better strength.
● Industrial Adhesives
Factories use blown asphalt in adhesive formulas because it improves bonding power.
● Protective Coatings
Pipes, steel structures, and tanks stay protected for many years when coated with oxidized bitumen.
Choosing the correct supplier ensures your project remains stable and cost-efficient. ATDM supplies high-quality blown asphalt and oxidized bitumen from Iran and the UAE, guaranteeing long-lasting performance.
What customers get from ATDM:
Consistent softening point & penetration values
Premium packing (drums, jumbo bags, customized)
Fast export delivery to all countries
Strong technical support
Pure, stable, industry-grade oxidized bitumen
With ATDM’s quality, companies reduce repairs, improve durability, and save money.
Blown asphalt and oxidized bitumen are essential materials for modern construction, waterproofing, roofing, and industrial production. Their special oxidation process gives them superior stability, making them last longer and perform better. For the best quality, ATDM supplies premium blown asphalt and oxidized bitumen from Iran and the UAE, helping companies achieve strong, durable, and cost-effective results in every project.
Yes. Blown asphalt and oxidized bitumen are two names for the same product. The name changes based on the industry, but both refer to bitumen that has been hardened by blowing air through it.
Most manufacturers choose oxidized bitumen 85/25 and oxidized bitumen 90/15 because they offer perfect flexibility, heat resistance, and strong adhesion.