OXIDIZED BITUMEN 85/25

Oxidized Bitumen 85/25 Technical Details

This grade of Bitumen has higher penetration Although its softening point is lower than grade 90/15 In addition to penetration testing, there are tests used to determine Oxidized bitumen 85/25, including viscosity, shape, and 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 80 and 90 ° C and the flash point is 225 ° C.

Oxidized Bitumen 85/25 is a premium air blown bitumen produced through the controlled oxidation of selected petroleum bitumen. The air blowing process increases the softening point while reducing penetration, creating a durable material with excellent thermal stability, waterproofing capability, and resistance to aging. With a softening point of approximately 85°C and a penetration value of approximately 25 dmm, this grade is widely used in construction and industrial applications requiring reliable long-term performance.

One of the key features of Oxidized Bitumen 85/25 is its excellent balance between flexibility and hardness. It remains stable under elevated temperatures while maintaining sufficient flexibility to accommodate minor structural movement without cracking. This makes it particularly suitable for roofing systems, waterproofing membranes, industrial mastics, and protective coatings.

Oxidized Bitumen 85/25 provides outstanding waterproofing performance by forming a continuous barrier against water and moisture. It also exhibits strong adhesion to concrete, steel, wood, masonry, and other construction materials, ensuring durable bonding and long-lasting protection.

Its excellent resistance to weathering, ultraviolet (UV) radiation, oxidation, and environmental aging helps extend the service life of structures exposed to harsh climatic conditions. In addition, the product offers good chemical resistance against dilute acids, alkalis, salts, and other industrial contaminants.

Bitumen 85/25 Features

• Softening Point approximately 85°C
• Penetration approximately 25 dmm
• Excellent waterproofing performance
• High thermal stability
• Strong adhesion to multiple substrates
• Good flexibility and dimensional stability
• Excellent UV and weather resistance
• High resistance to oxidation and aging
• Good chemical and corrosion resistance
• Long service life with minimal maintenance
• Easy hot process application
• Manufactured according to international quality standards

Oxidized Bitumen 85/25 is an ideal material for roofing membranes, waterproofing systems, pipe coatings, expansion joint fillers, industrial mastics, adhesives, corrosion protection, and insulation applications, providing dependable performance and long-term durability in demanding environments.

Bitumen 85/25 Uses

Building Waterproofing

• Roof waterproofing systems
• Foundation and basement waterproofing
• Concrete retaining walls
• Underground structures

Roofing Materials

• Bituminous roofing membranes
• Roofing felts
• Built up roofing systems (BUR)
• Roof maintenance and repair compounds

Protective Coatings

• Steel structure protection
• Concrete protective coatings
• Moisture barrier coatings
• Industrial anti-corrosion coatings

Pipeline Protection

• Underground pipeline coatings
• Water transmission pipelines
• Oil and gas pipeline protection
• Corrosion-resistant pipe wrapping

Sealants and Mastics

• Expansion joint fillers
• Bituminous sealants
• Industrial mastics
• Adhesive compounds

Industrial Applications

• Cable filling compounds
• Electrical insulation materials
• Damp-proof membranes
• Sound insulation systems

Bitumen 85/25 Benefits in These Applications

• Excellent waterproofing and moisture protection
• Strong adhesion to concrete, metal, wood, and masonry
• Good flexibility with high dimensional stability
• Excellent resistance to UV radiation and weathering
• High resistance to oxidation and aging
• Good chemical and corrosion resistance
• Long-lasting performance with low maintenance
• Easy application using conventional hot-process equipment

Oxidized Bitumen 85/25 is widely used in the roofing, waterproofing, pipeline, electrical, construction, and industrial sectors, where reliable moisture protection, excellent durability, and long-term performance are essential. Its balanced physical properties make it an ideal choice for demanding waterproofing and protective coating applications.

Oxidized Bitumen 85/25 is produced by passing controlled air through heated petroleum bitumen. This air blowing process changes the internal structure of the binder, raises its softening point, and lowers its penetration until the required 85/25 grade is achieved.

Main Production Materials

• Vacuum bottom or suitable base bitumen
• Air Oxidizing
• Process oil or flux

During production, the base bitumen is heated inside an oxidation reactor. Air is injected at a controlled rate while temperature, reaction time, and pressure are carefully monitored. The process increases the proportion of heavier asphaltic compounds, giving the finished material improved hardness, thermal stability, adhesion, and waterproofing properties.

Bitumen 85/25 characteristics are:

Softening Point: Around 85°C
Penetration: Around 25 dmm

The exact raw material proportions are not fixed because the formulation depends on the quality and composition of the selected feedstock. Manufacturers therefore control the finished grade through laboratory testing rather than following one universal chemical recipe.

After oxidation, the product is cooled and tested for softening point, penetration, heat stability, adhesion, and other required properties. It can then be packed in kraft bags, meltable bags, cartons, drums, or supplied in bulk.

Oxidized Bitumen 85/25 is formulated to provide a practical balance between hardness and flexibility. It is suitable for roofing membranes, waterproofing compounds, pipe coatings, industrial mastics, joint fillers, adhesives, corrosion protection, 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.