OXIDIZED BITUMEN 90/40

Oxidized Bitumen 90/40 Technical Details

This grade of Bitumen has too low penetration Although its softening point is lower than grade 115/15 In addition to penetration testing, there are tests used to determine Oxidized bitumen 90/40, including viscosity, shape, heat loss, and flash point. and the most important items are penetration and softening point.

According to the ASTM D36 method, the softening point of this grade of bitumen is between 85 and 95 ° C and the flash point is 250 ° C.

Oxidized Bitumen 90/40 is a high quality air blown bitumen produced through the controlled oxidation of selected petroleum bitumen. This process enhances the physical characteristics of the bitumen, providing an excellent combination of thermal stability, flexibility, waterproofing performance, and long term durability. With a softening point of approximately 90°C and a penetration value of approximately 40 dmm, this grade is widely used in roofing, waterproofing, industrial coatings, and construction applications where both flexibility and heat resistance are required.

One of the outstanding features of Oxidized Bitumen 90/40 is its balanced mechanical properties. Compared with harder oxidized grades, it offers greater flexibility while maintaining excellent dimensional stability at elevated temperatures. This balance allows the material to withstand thermal expansion and contraction without cracking, making it highly suitable for waterproofing systems exposed to changing weather conditions.

The material exhibits excellent adhesion to concrete, metal, masonry, wood, and insulation materials, creating a durable protective barrier against water penetration and environmental damage. Its high resistance to oxidation, ultraviolet (UV) radiation, and weathering ensures reliable long-term performance with minimal maintenance.

Oxidized Bitumen 90/40 also provides excellent resistance to dilute acids, alkalis, salts, and many industrial chemicals, making it suitable for demanding industrial environments. Its easy hot-process application allows efficient use in the production of membranes, mastics, sealants, and protective coatings.

Main Features

• Softening Point approximately 90°C
• Penetration approximately 40 dmm
• Excellent waterproofing performance
• Balanced flexibility and hardness
• High thermal stability
• Strong adhesion to multiple substrates
• Outstanding weather and UV resistance
• Excellent oxidation and aging resistance
• Good chemical and corrosion resistance
• High dimensional stability
• Easy hot-process application
• Long service life with low maintenance
• Manufactured according to international quality standards

Oxidized Bitumen 90/40 is an ideal material for roofing membranes, waterproofing systems, pipe coatings, expansion joint fillers, industrial mastics, corrosion protection, adhesives, and insulation applications, delivering dependable performance in demanding construction and industrial environments.

Oxidized Bitumen 90/40 is a versatile industrial grade bitumen developed for applications requiring a combination of excellent waterproofing, moderate flexibility, strong adhesion, and high thermal resistance. Its balanced physical properties make it suitable for a wide range of construction, waterproofing, insulation, and industrial protection projects where long-term performance is essential.

In the construction sector, Oxidized Bitumen 90/40 is widely used in waterproofing systems for foundations, basements, retaining walls, tunnels, and concrete structures. It creates a continuous moisture barrier that protects buildings against water penetration and extends the service life of structural components.

The roofing industry uses Oxidized Bitumen 90/40 in the production of roofing felts, waterproofing membranes, built-up roofing (BUR) systems, and roof maintenance compounds. Its excellent flexibility allows it to accommodate slight structural movement while maintaining reliable waterproofing performance.

In industrial applications, the product is commonly used for manufacturing bituminous mastics, protective coatings, expansion joint fillers, industrial adhesives, and anti-corrosion compounds. Its strong bonding characteristics ensure excellent adhesion to concrete, steel, wood, and masonry surfaces.

Oxidized Bitumen 90/40 is also suitable for pipeline protection, where it serves as a protective coating against moisture, corrosion, and aggressive environmental conditions. In addition, it is used in electrical and insulation products, including cable filling compounds, electrical insulation materials, vibration damping systems, and sound insulation products.

Bitumen 90/40 Uses

• Waterproofing membranes
• Roofing felts and roofing compounds
• Foundation waterproofing
• Expansion joint fillers
• Industrial mastics
• Bituminous adhesives
• Anti corrosion coatings
• Steel pipe protection
• Cable filling compounds
• Damp proof membranes
• Bridge deck waterproofing
• Concrete protective coatings

Oxidized Bitumen 90/40 is a dependable material for manufacturers and contractors seeking durability, moisture protection, thermal stability, and reliable long term performance in construction, industrial, and infrastructure applications. Its balanced characteristics make it one of the most versatile oxidized bitumen grades available for modern engineering projects.

This type of bitumen is used for Asphalt in road construction, Waterproof roofing felts, coating and insulation, and many other projects in different regions.

Oxidized Bitumen 90/40 is semi-solid Bitumen known by some formula according to application in industries such as:

Elementally, it contains 91% carbon and around 7% hydrogen, and other chemical contents are up to 1% sulfur, 1% nitrogen, 1% oxygen, and 2000ppm metals.

Bitumen Products are composed mainly of highly condensed polycyclic aromatic hydrocarbons.

Oxidized Bitumen 90/40 is produced by modifying suitable petroleum bitumen through a controlled air-blowing process. The objective is to obtain a binder with a softening point of about 90°C and a penetration value near 40 dmm, providing greater flexibility than harder oxidized grades.

Production Basis

The formulation generally involves:

• Selected vacuum bottom or penetration grade bitumen as the main feedstock
• Controlled air injection as the oxidation medium
• A limited quantity of process oil or flux, only when needed to adjust flexibility and penetration

The base material is heated inside an oxidation reactor until it reaches the required processing condition. Air is then passed through the molten bitumen at a regulated rate. This reaction modifies the hydrocarbon structure, increases the heavier asphaltic components, and gradually raises the softening point.

For the 90/40 grade, the oxidation process is carefully stopped before the material becomes excessively hard. This controlled production method preserves a penetration level of approximately 40 dmm, giving the finished product a practical balance of thermal resistance, adhesion, and flexibility.

Main Quality Items

• Softening point: approximately 90°C
• Penetration: approximately 40 dmm
• Good flexibility at service temperatures
• High waterproofing performance
• Strong adhesion to construction materials
• Reliable resistance to oxidation and weathering

Oxidized Bitumen 90/40 does not have one universal ingredient percentage because the required processing time and feedstock adjustment depend on the original bitumen quality. The finished grade is therefore defined by laboratory-tested performance properties rather than a fixed chemical recipe.

This formulation is suitable for roofing membranes, waterproofing compounds, industrial mastics, adhesives, joint fillers, pipe coatings, protective coatings, and insulation materials.

Packing of this type of bitumen would be 25 kg poly bags or 25 kg carton boxes with pallets or without pallets.