Bitumen Grade 85/25
Last updated: 2026-10-09
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Bitumen grade 85/25 is a penetration-grade bitumen with a penetration value of 85 (0.1 mm at 25°C) and a softening point of approximately 25°C. It is a relatively soft, low-viscosity grade used primarily in cold climates and specialized applications such as waterproofing, joint sealing, and surface dressing. It is not a standard paving grade like 60/70 or 40/50, so it is typically produced on request rather than stocked in bulk.
What Is Bitumen Grade 85/25?
Bitumen grade 85/25 sits at the soft end of the penetration-grade spectrum. The "85" refers to needle penetration depth in units of 0.1 mm, and the "25" refers to the softening point in degrees Celsius. This combination produces a material that remains workable at lower ambient temperatures, which is exactly why it suits cold-region and non-paving uses.
| Property | Test Method | Typical Value | Unit |
|---|---|---|---|
| Penetration @ 25°C, 100 g, 5 s | ASTM D5 / EN 1426 | 85 ± 5 | 0.1 mm |
| Softening Point (R&B) | ASTM D36 / EN 1427 | 22–28 | °C |
| Flash Point (Cleveland Open Cup) | ASTM D92 | ≥ 220 | °C |
| Solubility in Trichloroethylene | ASTM D2042 | ≥ 99.0 | % |
| Density @ 25°C | ASTM D70 | 1.00–1.04 | g/cm³ |
| Viscosity @ 60°C | ASTM D2171 | 150–300 | Pa·s |
| Loss on Heating (163°C, 5 h) | ASTM D1754 | ≤ 1.0 | % |
| Penetration after heating (retained) | ASTM D5 | ≥ 60 | % of original |
Key takeaway: 85/25 is softer and has a lower softening point than mainstream paving grades. That means less stiffness at service temperatures, better low-temperature flexibility, and greater susceptibility to rutting under heavy traffic — so it is used where those trade-offs make sense.
Bitumen Grade 85/25 vs Other Common Penetration Grades
The table below is the fastest way for engineers and buyers to position 85/25 against the grades they already know. The differences in penetration and softening point drive the application differences.
| Grade | Penetration @ 25°C (0.1 mm) | Softening Point (°C) | Typical Use | Relative Stiffness |
|---|---|---|---|---|
| 40/50 | 40–50 | 50–58 | Heavy-duty paving, hot climates | High |
| 60/70 | 60–70 | 45–53 | Standard paving (global benchmark) | Medium-High |
| 80/100 | 80–100 | 42–50 | General paving, moderate climates | Medium |
| 85/25 | 85 ± 5 | 22–28 | Waterproofing, sealing, cold use | Low |
| 100/120 | 100–120 | 38–45 | Cold-weather paving, seal coats | Low-Medium |
| 160/220 | 160–220 | 34–40 | Very cold climates, spray applications | Very Low |
Important distinction: Most commercial grades are named by penetration alone (60/70, 80/100). Grade 85/25 is specified using penetration and softening point, which makes it a tighter, application-specific specification. Do not confuse it with 80/100 — the softening point differs by roughly 15–20°C, which changes performance significantly.
- Lower softening point (22–28°C): flows more readily at low application temperatures
- Higher penetration (85): greater flexibility, weaker load-bearing capacity
- Narrower spec window: less tolerance for blending error during production
- Higher production cost: typically 5–15% above standard 60/70 on a per-tonne basis due to limited run sizes
Applications and Performance in Practice
85/25 is chosen where flexibility and low-temperature workability matter more than rutting resistance.
Primary applications:
| Application | Why 85/25 Fits | Typical Consumption |
|---|---|---|
| Roofing & waterproofing membranes | High flexibility, good adhesion to substrates | 2–4 kg/m² |
| Joint & crack sealing | Flows into narrow joints at low temp | 0.5–2 kg per meter |
| Surface dressing / chip seal | Good aggregate retention in cool conditions | 1.0–1.8 kg/m² |
| Cold-mix and cutback production | Easier to dissolve/blend with solvents | Varies |
| Pipe coating & corrosion protection | Flexible, durable coating film | Application-specific |
| Dampproofing & basement sealing | Low-temperature flexibility prevents cracking | 1.5–3 kg/m² |
Performance data to expect:
- Service temperature range: −20°C to +45°C in most waterproofing applications
- Low-temperature flexibility: passes flexibility tests down to −10°C to −15°C (varies by formulation)
- Aging resistance: typically 5–10 years in exposed roofing, longer when covered
- Adhesion to concrete: generally ≥ 0.5 MPa in standard pull-off tests when properly applied
Where it should NOT be used:
- High-traffic asphalt pavements in warm climates (rutting risk)
- Airport runways or heavy axle-load roads
- Any application with sustained surface temperatures above 50°C
Market Data: Pricing, Packaging, and Logistics
Pricing for 85/25 is driven by crude source, refinery run size, and freight. Because it is a niche grade, order volumes and lead times differ sharply from mainstream grades.
Indicative pricing (FOB, bulk, ex-refinery):
| Region | Price Range (USD/MT) | Typical MOQ | Lead Time |
|---|---|---|---|
| Middle East (Iran, UAE) | 380–460 | 100–500 MT | 10–20 days |
| Southeast Asia | 430–520 | 100–500 MT | 7–15 days |
| Europe | 480–580 | 50–200 MT | 10–25 days |
| India | 450–540 | 100–1,000 MT | 5–12 days |
| North America | 550–700 | 20–100 MT | 5–15 days |
Prices are indicative and move with crude benchmarks. Always confirm current quotes.
Packaging options:
| Format | Net Weight | Best For | Cost Premium vs Bulk |
|---|---|---|---|
| Bulk (tanker/truck) | 20–30 MT per load | Large projects | Baseline |
| New steel drums | 150–182 kg | Export, small sites | +8–15% |
| Used drums | 150–182 kg | Domestic, budget projects | +4–8% |
| Polybags | 20–50 kg | Retail, small repairs | +15–25% |
| Jumbo bags | 1 MT | Warehousing, mid-size | +10–18% |
Logistics notes:
- Container capacity: ~18–19 MT per 20-ft container in drums (vs. ~24–26 MT bulk in flexitank)
- Flexitank option: 22–24 MT per 20-ft container; requires heated discharge
- Storage temperature: keep at 120–150°C for pumping; avoid prolonged storage above 160°C to prevent hardening
- Shelf life: bulk stored hot is best used within 30–60 days; drums can be stored for 6–12 months in covered conditions
Quick buyer checklist:
- Confirm penetration and softening point, not just the first number
- Request retained penetration after heating (aging indicator)
- Verify flash point ≥ 220°C for safe transport
- Check batch certificates (ASTM D5, D36, D92 at minimum)
- Confirm discharge capability (heaters, pumps) at destination
Quality Control and Specifications
Because 85/25 is a dual-spec grade, quality control is stricter than for single-number penetration grades. Both properties must fall in range simultaneously.
Minimum test certificate requirements:
| Test | Standard | Acceptable Range |
|---|---|---|
| Penetration @ 25°C | ASTM D5 / EN 1426 | 80–90 (0.1 mm) |
| Softening Point | ASTM D36 / EN 1427 | 22–28°C |
| Flash Point | ASTM D92 | ≥ 220°C |
| Solubility | ASTM D2042 | ≥ 99.0% |
| Loss on Heating | ASTM D1754 | ≤ 1.0% |
| Retained Penetration | ASTM D5 | ≥ 60% |
| Ductility @ 25°C | ASTM D113 | ≥ 100 cm |
Red flags to reject a batch:
- Penetration outside 80–90 even if softening point looks correct
- Softening point drift greater than ±3°C from certificate
- Flash point below 200°C (transport safety and possible contamination)
- Retained penetration below 60% (indicates poor thermal stability)
- Solubility below 99% (suggests filler or contamination)
- Sampling: take 3 samples per 100 MT; test at source and destination
- Verification: independent lab testing costs USD 150–400 per sample — cheap insurance on 500 MT orders
- Documentation: require manufacturer's COA plus third-party test report for orders over 200 MT
FAQ: Bitumen Grade 85/25
Q1: What is the difference between bitumen 85/25 and 80/100?
85/25 is defined by both penetration (85) and softening point (25°C), while 80/100 is defined by penetration range only. The lower softening point of 85/25 makes it significantly softer at service temperatures, suiting waterproofing and sealing rather than paving.
Q2: What is the price of bitumen grade 85/25 per tonne?
Indicative FOB prices range from USD 380–700 per MT depending on region, order volume, and packaging. Bulk orders of 500 MT or more from Middle East refineries typically land near USD 380–460 per MT, while small drummed orders in North America can exceed USD 700 per MT.
Q3: Is bitumen 85/25 suitable for road construction?
Generally no. Its low softening point (22–28°C) makes it prone to rutting under traffic and warm weather. It may appear in low-volume surface dressing or cold-mix applications, but it is not a substitute for 60/70 or 40/50 in structural pavement layers.
Q4: What is the minimum order quantity for grade 85/25?
MOQs range from 20–100 MT for drummed or bulk truckloads in North America and Europe to 100–500 MT for bulk vessel shipments from Asia and the Middle East. Flexitank shipments typically start at 22–24 MT per container.
Q5: How should bitumen 85/25 be stored and handled?
Store bulk material at 120–150°C in heated tanks with agitation to maintain uniformity, and never exceed 160°C for extended periods. Drums should be kept covered, upright, and away from direct sun, with a recommended shelf life of 6–12 months.
Calculate Your Bitumen 85/25 Cost Instantly
Bitumen grade 85/25 is a soft, dual-spec penetration grade built for waterproofing, sealing, and cold-climate applications rather than heavy-duty paving. With FOB prices of roughly USD 380–700 per MT, MOQs from 20–500 MT, and lead times of 5–25 days depending on region, accurate cost planning matters.
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