Oxidized
Bitumen 85/25
Petra Oil’s Oxidized Bitumen 85/25 is a premium-grade, air-blown bitumen developed for applications that require a strong balance of rigidity and moderate flexibility. With a softening point of 85°C and a penetration value of 25 dmm at 25°C, Bitumen 85/25 is engineered to deliver outstanding thermal resistance and reliable performance in demanding industrial and construction settings.
This grade is produced through a carefully controlled oxidation process that modifies the physical properties of straight-run bitumen. The result is a semi-rigid, weather-resistant material that resists deformation under load and temperature fluctuations. Bitumen 85/25 is widely used in waterproofing membranes, pipe coatings, joint fillers, and roofing applications where durability and environmental protection are key requirements. Conforming to ASTM D36 and ASTM D5 standards, Bitumen 85/25 provides consistent quality and dependable behavior during processing and long-term use.
Key Specifications:
- Softening Point: ~85°C
- Penetration: ~25 dmm at 25°C
- Flash Point: ≥250°C
- Ductility at 25°C: ≥1.5 cm
- Solubility in CS₂: ≥99%
- Loss on Heating: ≤0.2%
Main Applications:
- Waterproofing and roofing sheets
- Pipe insulation and corrosion-resistant coatings
- Structural expansion joint sealants
- Industrial adhesive formulations
Key Benefits:
- Excellent Heat Resistance: Suitable for hot climates and thermal load exposure.
- Strong Adhesion: Bonds well to various surfaces including concrete, metal, and masonry.
- Moisture and Aging Resistant: Maintains performance in humid and exposed conditions.
- Reliable Structural Performance: Balances rigidity with enough flexibility to prevent cracking under stress.
Specification
No |
Description |
Unit |
85/25 Grade |
Test Method |
|---|---|---|---|---|
1
|
Specific Gravity @ 25°C
|
Kg/Cm3
|
1.05 aprx
|
ASTM D70
EN 15326
|
2
|
Penetration @ 25°C
|
MM/10
|
20/30
|
ASTM D5
EN 1426
|
3
|
Softening Point °C
|
°C
|
80/90
|
ASTM D36
EN 1427
|
4
|
Loss on Heating (wt) %
|
WT %
|
0.2 Max
|
ASTM D6
EN 13303
|
5
|
Flash Point °C
|
°C
|
250 Min
|
ASTM D92
EN ISO 2592
|
6
|
Solubility is CS2 (wt) %
|
WT %
|
99.5 Min
|
ASTM D4
EN 12592
|
7
|
Spot Test
|
@
|
Negative
|
AASHOT 102
|
