Penetration Bitumen 85/100 is a common penetrating bitumen with outstanding qualities for asphalt road building, road coating, and road paving. Creating hot asphalt mixes is the primary use for this kind of bitumen. Bitumens with a permeability of 85 to 100 are created by the aeration process at the base of the distillation tower, also called the vacuum baton. The thermoplastic properties of bitumens suitable for penetration vehicles lead the bitumen’s viscosity to drop at hot temperatures and rise at low temperatures. 85-100 bitumen is often used for road coating. An 85-100 bitumen has a penetration of 8.5 to 10 mm.

Needle penetration into bitumen can be estimated using the values listed in the penetration grades. In this procedure, a needle meeting the requirements of ASTM D5 and of a certain size is permitted to make a vertical puncture in a sample of bitumen. Needle penetration is reported in millimeters. As was previously mentioned, bitumen penetration 85-100 causes the needle to sink 8.5 to 10 mm. For most tests, 100 g of needle load is used for 5 seconds at a temperature of 25 C. The average of three separate readings is used to get a number for bitumen penetration. For testing the penetration of soft bitumen, longer needles and deeper cups are required.

Penetration is enhanced and the test result is more positive when the bitumen is warm and pliable. As with the hardening point, the softening point is a common method for determining the quality of bitumen. In this test, a tiny steel ball is put on top of a bitumen sample enclosed in a brass ring, and the whole assembly is suspended in a bath containing water or glycerin, as specified by ASTM D36. Bitumen softens and deforms gently as the bath temperature increases at a rate of 5 degrees Celsius per minute as the ball makes its way around the ring. Bitumen 85.100, which is used for penetration, has a melting point of 41 to 49 degrees Celsius.


Our firm, Petro Naft, manufactures high-quality penetration grade bitumen called bitumen 85/100. This kind of bitumen is utilized in a variety of sectors, including road building, waterproofing, and roofing, and has a penetration value of 85 to 100 decimeters.

At Petro Naft, we create high-quality bitumen that satisfies international requirements using the most recent technology and production techniques. Our bitumen 85/100 is produced by distilling crude oil, and it undergoes extensive refinement to guarantee that it adheres to the necessary standards.

Our Bitumen 85/100 is renowned for its superior thermal stability, great resilience to aging and weathering, and superior adherence to a variety of surfaces. This makes it perfect for a number of uses, including as waterproofing, bridge decking, airport runways, and road building.

Our goal is to provide our clients with high-quality bitumen that satisfies their demands. We take great pride in our exceptional customer service and our seasoned team of experts works constantly to guarantee that our goods are of the highest quality.

You need go no farther than Petro Naft if you’re seeking for a dependable provider of bitumen 85/100. We are committed to provide the greatest goods and services to our clients, and we are eager to assist you. To find out more about our goods and services, get in touch with us immediately.

We produce penetration bitumen 85/100 of the best quality in a variety of types and export them from Iran and the United Arab Emirates to other nations worldwide.

  • Iran Penetration Bitumen 85/100 ( Iran Bitumen 85/100 )
  • Emirates Peneteration Bitumen 85/100 ( Emirates Bitumen 85/100 )


A bitumen with a low degree of penetrability is called hard bitumen, whereas a bitumen with a high degree of penetrability is called soft bitumen and is utilized in cold locations. When it comes to temperature, soft bitumen is preferred in colder regions, whereas hard bitumen is used in hotter regions.

Some benefits of using Penetration bitumen 85/100 include:

  • Because of its extraordinary adaptability, it may be employed in fields that need a coating with a wide range of motion.
  • Superb adhesion is one of its many features.
  • High-penetration graded bitumen works well even in low-particle-density soils.



Bitumen 85/100Test methodUnitSpecification
Specific gravity @ 25°CASTM D70Kg/cm31.01/1.06
Penetration @ 25°CASTM D5mm/1085/100
Softening point °CASTM D36°C41/49 C
Ductility @25 °CASTM D113cm100 min
Loss on heating(wt) %ASTM D6wt %0.2 max
Drop in penetration after heating %ASTM D5-D6%20 max
Flashpoint °CASTM D92°C250 min
Solubility in CS2(wt) %ASTM D4wt %99.5 min
Spot testA.A.S.H.O.T102 Negative


Bitumen penetration grade 85/100 is often utilized in the construction of cold-weather roads. Because penetration grade bitumen 85-100 is a soft bitumen, it performs best in high particle density soils like clay. They are smaller in size and may be readily penetrated by bitumen 85-100, a soft bitumen. High penetration graded bitumen performs effectively in low particle density soils.

Petro Naft manufactures the highest quality Penetration Bitumen 85/100 in different types and exports it from Iran and the UAE to other countries around the world.

  • Penetration Bitumen 85/100 Iran
  • Penetration Bitumen 85/100 UAE


New Steel Drum, Bulk.
* This grade can be shipped in Jumbo Bag, if the weather is frigid. (Low temperature causes bitumen gets hard)

2 Responses

  1. What temp range we can use for 85/100 asphalt grade because it is biased when we define cold cliamate for different region

    1. The 85/100 asphalt grade refers to the hardness or softness of bitumen at 25 degrees Celsius. This grade is suitable for moderate climates. For hotter climates, harder grades like 40/50 might be used, and for colder climates, softer grades like 120/150 or 160/220 might be more appropriate. Consult a local pavement specialist to choose the right grade based on local temperature conditions.

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