Bitumen Mortar
Last updated: 2026-10-16
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Bitumen Mortar
Bitumen mortar is a thermoplastic adhesive paste made by blending 60/70 or 40/50 penetration-grade bitumen with 8–12% mineral filler (limestone dust, fly ash, or Portland cement) and heating it to 160–180°C before application. It is used for joint sealing, waterproofing, waterproofing membranes, pipe coating, and brick/tile bonding, with a typical consumption of 1.2–1.8 kg/m² per millimeter of layer thickness. Pricing ranges from USD 320 to USD 480 per metric ton FOB depending on grade, filler content, and packaging (drum, bulk, or kraft paper bags for cold-mix variants).
What Is Bitumen Mortar? Definition, Composition, and Standards
Bitumen mortar is often confused with bituminous mastic, asphalt mortar, and bitumen emulsion mortar. The distinction matters for export documentation and for buyers specifying the right product for a project.
| Property | Bitumen Mortar | Bituminous Mastic | Cement Mortar |
|---|---|---|---|
| Binder | Bitumen 60/70 or 40/50 | Bitumen + polymer | Portland cement |
| Filler content | 8–12% | 15–25% | Sand + cement |
| Application temp | 160–180°C | 180–200°C | Ambient |
| Flexibility | Moderate | High (polymer-modified) | None |
| Typical use | Joints, waterproofing, brick bonding | Roofing, tank lining | Masonry, plaster |
| Shelf life (cold mix) | 12–18 months | 6–12 months | 3–6 months |
Standard compositions used in export markets:
- Hot-applied bitumen mortar (60/70): 88–92% bitumen, 8–12% limestone filler, penetration 60–70 dmm at 25°C, softening point 48–56°C.
- Hot-applied bitumen mortar (40/50): 85–90% bitumen, 10–15% filler, softening point 52–60°C — used in warmer climates and heavy-duty joints.
- Cold-applied bitumen mortar (cutback/solvent-based): 50–60% bitumen solids, 40–50% solvent (kerosene/diesel), applied at ambient temperature.
- Emulsion-based mortar: 55–65% bitumen solids, 35–45% water + emulsifier, cures in 24–48 hours depending on humidity.
Compliance: Most exported bitumen mortar is tested against ASTM D312 (Type I–IV), ASTM D449, or EN 12970 for mastic asphalt. Middle East and North Africa buyers frequently request AASHTO M 20 penetration grading alongside filler content certification.
Bitumen Mortar Pricing, Packaging, and Export Data
Prices move with crude oil benchmarks. The table below reflects Q1–Q2 2024 FOB pricing from Middle East and Asian refineries, based on bulk drum and jumbo bag shipments.
| Product Type | Packing | Price (USD/MT FOB) | MOQ | Lead Time |
|---|---|---|---|---|
| Bitumen mortar 60/70 hot-mix | 180 kg steel drum | 380–420 | 20 MT | 10–14 days |
| Bitumen mortar 60/70 hot-mix | 1 MT jumbo bag | 360–400 | 25 MT | 12–18 days |
| Bitumen mortar 40/50 hot-mix | 180 kg steel drum | 400–450 | 20 MT | 10–16 days |
| Cold-applied bitumen mortar | 20 kg pail | 470–540 | 5 MT | 7–12 days |
| Emulsion bitumen mortar | 200 kg drum | 420–480 | 10 MT | 10–15 days |
Price drivers:
- Crude oil: A USD 10/bbl swing in Brent moves bitumen mortar pricing by roughly USD 25–35/MT within 4–6 weeks.
- Filler type: Limestone filler adds USD 8–12/MT; fly ash adds USD 4–7/MT; Portland cement filler adds USD 15–22/MT.
- Packaging: Bulk (tanker) saves USD 25–40/MT versus drummed cargo; jumbo bags sit between the two.
- Freight: A 20 MT container from Jebel Ali to Rotterdam costs USD 900–1,400; to West Africa USD 1,600–2,300; to Southeast Asia USD 700–1,100.
Volume benchmarks: A standard 20-foot container holds 20–22 MT of drummed bitumen mortar or 25–28 MT in jumbo bags. A 40-foot container doubles that, but weight limits usually cap drummed cargo at 20 MT per 20-foot box.
Bitumen Mortar Applications and Consumption Rates
Consumption depends on substrate, layer thickness, and application method. The following rates assume hot-applied mortar at 160–180°C.
| Application | Layer Thickness | Consumption | Coverage per MT |
|---|---|---|---|
| Waterproofing membrane bonding | 1.0–1.5 mm | 1.2–1.8 kg/m² | 550–830 m² |
| Expansion joint sealing (20 mm) | 20 mm | 22–26 kg/m | 38–45 m |
| Pipe coating (4-inch pipe) | 3 mm | 0.9–1.2 kg/m | 830–1,100 m |
| Brick/tile bonding | 2–3 mm | 2.5–3.5 kg/m² | 285–400 m² |
| Roof waterproofing | 3–5 mm | 3.5–6.0 kg/m² | 165–285 m² |
| Foundation damp-proofing | 2 mm | 2.2–3.0 kg/m² | 330–455 m² |
Worked example — 10,000 m² waterproofing project:
- Required mortar at 1.5 mm: 10,000 × 1.5 kg = 15,000 kg = 15 MT
- Price at USD 400/MT FOB: USD 6,000
- Wastage allowance (5–8%): 0.75–1.2 MT extra
- Total order: 16 MT (fits one 20-foot container with margin)
Application temperatures matter: Mortar applied below 150°C will not wet the substrate properly and can debond within 6–12 months. Above 190°C, the bitumen oxidizes, and the penetration value drops by 10–15 dmm, making the joint brittle.
Bitumen Mortar vs. Alternatives: Data Comparison
Buyers often ask whether bitumen mortar, bituminous mastic, polyurethane sealant, or cement mortar is the better choice. The table below compares them on measurable criteria.
| Criterion | Bitumen Mortar | Bituminous Mastic | Polyurethane Sealant | Cement Mortar |
|---|---|---|---|---|
| Cost per kg (installed) | USD 0.40–0.55 | USD 0.60–0.90 | USD 4.00–7.00 | USD 0.15–0.30 |
| Service life | 10–15 years | 15–20 years | 20–25 years | 25–50 years |
| Flexibility (elongation) | 5–15% | 30–50% | 300–600% | <1% |
| Water resistance | Excellent | Excellent | Excellent | Moderate |
| UV resistance | Poor | Moderate | Excellent | Excellent |
| Application temp | 160–180°C | 180–200°C | Ambient | Ambient |
| Cure time | 30–60 min | 24–48 hours | 24–72 hours | 7–28 days |
| VOC content | Low (hot) / High (cold) | Low | Low | None |
Selection guidance:
- Bitumen mortar wins on cost-per-square-meter for large-area waterproofing, pipe coating, and damp-proofing where UV exposure is low.
- Bituminous mastic is preferred where flexibility and thermal cycling are concerns — bridge decks, tank bases, and industrial roofs.
- Polyurethane sealant is 10–14× more expensive but is the only realistic option for high-movement joints exposed to sunlight.
- Cement mortar remains cheapest for masonry but has zero flexibility and fails in expansion joints within 2–3 years.
Export demand pattern (2023–2024): West Africa and South Asia account for roughly 45% of bitumen mortar shipments, driven by road, pipeline, and housing programs. The Middle East supplies about 38% of global export volume, with Iran, UAE, and Bahrain as the main origins.
Handling, Storage, and Quality Checks
Hot-applied bitumen mortar is delivered either molten (tanker/thermos containers) or as solid blocks/drums to be re-melted on site. Cold-applied and emulsion types are ready-to-use.
Storage rules:
- Drummed/jumbo bag hot-mix: store below 40°C, away from direct sunlight, stacked no more than 3 drums high to avoid deformation.
- Cold-applied pails: store at 5–35°C; freezing degrades emulsion stability. Shelf life 12–18 months in sealed pails.
- Molten transport: maintain at 150–165°C in thermos tanks; delivery within 24–48 hours of loading to prevent excess oxidation.
Quality checks before acceptance:
- Penetration test (ASTM D5): 60/70 grade must read 60–70 dmm at 25°C; a reading below 55 dmm signals overheating.
- Softening point (ASTM D36): 48–56°C for 60/70 mortar; below 46°C means excess filler or light oil contamination.
- Filler content (ASTM D4311): ash content should fall between 8% and 12%; above 15% the mortar becomes too stiff to penetrate joints.
- Solubility (ASTM D2042): should be ≥99% for straight-grade bitumen mortar.
- Flash point (ASTM D92): minimum 230°C for hot-applied safety during transport.
Site application checklist:
- Preheat substrate to dry, clean, and above 5°C surface temperature.
- Use a bitumen boiler with mechanical agitation to keep filler in suspension.
- Apply within 30–60 minutes of reaching target temperature.
- Do not exceed 190°C for more than 30 minutes — degradation accelerates sharply.
FAQ: Bitumen Mortar
Q1: What is the price of bitumen mortar per ton?
Hot-applied bitumen mortar 60/70 typically sells for USD 360–420 per metric ton FOB in 2024, while cold-applied and emulsion variants range from USD 420–540 per ton. Freight and packaging add USD 25–80 per ton depending on destination.
Q2: What is the difference between bitumen mortar and bituminous mastic?
Bitumen mortar contains 8–12% filler and is used for joints, bonding, and waterproofing, while bituminous mastic contains 15–25% filler and often polymer additives for higher flexibility. Mastic costs USD 0.60–0.90 per kg installed versus USD 0.40–0.55 for mortar.
Q3: How much bitumen mortar do I need per square meter?
At a 1.5 mm layer, expect 1.2–1.8 kg/m² for waterproofing, and 2.5–3.5 kg/m² for brick or tile bonding at 2–3 mm. Always add 5–8% wastage for site losses and equipment residue.
Q4: At what temperature should bitumen mortar be applied?
Hot-applied mortar must be heated to 160–180°C and applied while the substrate is dry and above 5°C. Exceeding 190°C for more than 30 minutes degrades the bitumen and lowers penetration by 10–15 dmm.
Q5: What is the shelf life of cold-applied bitumen mortar?
Cold-applied and emulsion bitumen mortars have a shelf life of 12–18 months when stored sealed at 5–35°C. Freezing or storage above 40°C can break the emulsion, causing separation that cannot be re-mixed on site.
Closing CTA: Calculate Your Bitumen Mortar Cost with 6Tar
Before you send an inquiry or book a container, run your numbers through the 6Tar cost calculator at 6tar.com. Enter your grade (60/70, 40/50, emulsion), volume in MT, packing type (drum, jumbo bag, pail), and destination port — the tool returns a landed cost estimate in seconds, including FOB price, freight, insurance, and unloading allowance. For orders above 20 MT, request a live quote: 6Tar sources bitumen mortar directly from Middle East and Asian refineries, ships in 10–18 days, and provides ASTM/EN test certificates with every batch. Start with the calculator, then talk to an export specialist to lock in your price before the next crude oil swing moves the market.