As a bitumen supplier in Tanzania, ZUMRUT INT Co. delivers penetration grades 60/70, 80/100 and 40/50 plus oxidized grades into Dar es Salaam, Tanga and Mtwara in drums, jumbo bags and bulk. Tanzania is worth understanding as two markets at once: its own road programme, and the Central Corridor that carries cargo inland to Zambia, the DRC, Rwanda, Burundi and Uganda.
Choosing a bitumen grade for Tanzanian conditions
Penetration grade measures hardness at 25 °C: the lower the number, the harder the binder. Tanzania is not one climate, and the grade that suits a coastal road in Dar es Salaam is not automatically the grade for a highland road near Mbeya.
The coastal belt from Tanga through Dar es Salaam to Mtwara is humid tropical — consistently hot, high rainfall, narrow daily range. The central plateau around Dodoma and Singida is semi-arid with hotter peak temperatures and a wider daily swing. The southern and northern highlands around Mbeya, Iringa and Arusha sit at altitude and run materially cooler.
| Grade | Penetration | Character | Where it fits in Tanzania |
|---|---|---|---|
| Bitumen 40/50 | 40–50 dmm | Hardest | Dar es Salaam port approaches and container yards, airport pavements, the central plateau, heavy freight corridors carrying transit traffic |
| Bitumen 60/70 | 60–70 dmm | Standard paving grade | The national default — trunk roads, regional roads, urban arterials across most of the country |
| Bitumen 80/100 | 80–100 dmm | Softest | Highland districts around Mbeya, Iringa and Arusha, cold-mix patching, district and feeder roads worked without hot plant |
Typical values. A batch certificate of analysis is issued before every shipment.
The rainfall misconception
The coastal belt gets a great deal of rain, and the request we field most often as a bitumen supplier in Tanzania is for a softer grade because of it. That is the wrong response.
Penetration grade is matched to temperature, not moisture. What heavy rainfall attacks is the bond between binder and aggregate — a failure mode called stripping — and that is solved through aggregate selection, mix design and anti-strip additives. Specifying a softer binder because a site is wet gives you rutting without addressing the moisture problem at all.
Ports, and the Central Corridor
Tanzania has three working commercial ports, and the choice matters more here than in most East African markets because one of them serves six countries.
| Port | Role | Serves |
|---|---|---|
| Dar es Salaam | Principal port, handles the large majority of national trade | Dar es Salaam, the coast, the central plateau, and the Central Corridor inland |
| Tanga | Northern port | Tanga, Kilimanjaro and Arusha regions, and the northern corridor toward Kenya |
| Mtwara | Southern deep-water port | Mtwara, Lindi and the southern regions, plus cross-border traffic to northern Mozambique |
This is the part most suppliers miss. Dar es Salaam is not only Tanzania’s port. It is the sea gateway of the Central Corridor, which carries cargo inland to Zambia, the Democratic Republic of Congo, Rwanda, Burundi, Uganda and Malawi. A landlocked buyer in Kigali or Lubumbashi may be buying bitumen that discharges at Dar es Salaam.
If your project sits across a border, the sea leg and the shipping documents are identical to a Tanzanian cargo. What changes is the inland arrangement and the transit customs regime, and both need to be set up before the vessel arrives rather than after. Tell us the final delivery point, not just the discharge port, and we will price the whole route.
Applications across Tanzanian projects
These are the applications a bitumen supplier in Tanzania is most often asked to cover, from trunk road contracts down to district maintenance work.
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Trunk and regional roads
The national network linking Dar es Salaam, Dodoma, Mwanza, Arusha and Mbeya. High traffic and continuous heavy freight, much of it transit.
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Urban roads
Dar es Salaam, Dodoma, Mwanza and Arusha — arterials and municipal networks, much of it rehabilitation under constant traffic.
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District and feeder roads
The largest programme by length. Often surface treatment or cold-mix work carried out by crews without hot plant.
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Airport pavements
Julius Nyerere, Kilimanjaro, Mwanza and the regional airports, where harder grades are typically specified and compliance is audited.
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Port and industrial hardstanding
Container yards and port aprons at Dar es Salaam and the industrial estates around it.
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Roof and foundation waterproofing
Membranes and coatings across the building programme. On the humid coast, waterproofing is structural rather than cosmetic.
Oxidized bitumen for roofing and waterproofing
Oxidized grades are not produced in Tanzania at commercial scale, and in a climate with this much coastal rainfall, roof and foundation waterproofing is not optional. These are the grades we ship most often into the East African building market.
| Grade | Softening point | Penetration | Use in Tanzania |
|---|---|---|---|
| Oxidized 85/25 | 80–90 °C | 20–30 dmm | The most widely traded grade — roofing felt, torch-on membranes, foundation damp-proofing |
| Oxidized 90/15 | 85–95 °C | 10–20 dmm | Sealing compounds, joint filling, harder membrane applications |
| Oxidized 115/15 | 110–120 °C | 10–20 dmm | Pipe coating, industrial membranes, heavy-duty sealing |
Full range on our oxidized bitumen page. For finished membrane rather than raw binder, see bitumen roll sheet.
Working through the rains
Tanzania runs two rainfall patterns. Much of the country has a single long season roughly November to April. The north and the coast run a bimodal pattern: long rains around March to May, short rains around November to December. Either way, a meaningful part of the year is closed to hot-mix paving.
Emulsions, particularly cationic CSS-1 and CRS-1, extend the working window because water is already the carrier and they tolerate damp aggregate. Cutback grades cure by solvent evaporation and need a genuinely dry surface, so they are less forgiving here. Neither bonds to standing water, but emulsion is the more practical choice for maintenance work in a Tanzanian wet season.
The practical implication is ordering timing. If your programme starts when the rains end, place the order before — every contractor in the region mobilises in the same window, and that is when lead times stretch.
Not sure which of the two you need? See our comparison of cutback bitumen and bitumen emulsion.
Bitumen price in Tanzania
Delivered price into Dar es Salaam is built from four moving parts, plus one specific to this market. Any bitumen supplier in Tanzania quoting a flat number without naming these is quoting a number that will not hold.
Crude and vacuum bottom. Vacuum bottom is the feedstock and its price tracks crude with a lag. The largest single component.
Ocean freight. Rates from the Gulf and the Mediterranean into East African ports move independently of crude and swing with vessel availability and Red Sea routing. Dar es Salaam is well served from Jebel Ali, which keeps this component lower than on the West African routes.
Port handling and clearance. Dar es Salaam congestion and demurrage are real costs. For cargo headed to the northern regions, Tanga is sometimes cheaper on landed cost despite smaller vessel options.
Inland leg, and whether it crosses a border. This is the Tanzania-specific factor. A cargo clearing for domestic use and a cargo moving in transit to Zambia or the DRC have different documentation, different timelines and different costs. Price them separately.
Indicative levels are published on our bitumen price page and updated weekly. A firm quote is issued against a specific quantity, discharge port, final delivery point and delivery window.
Payment, inspection and documentation
Our standard terms as a bitumen supplier in Tanzania are 50% by TT in advance, balance against a copy of the Bill of Lading. The advance secures production and loading; the balance falls due once the cargo is demonstrably on the water and documented. We do not work on letters of credit — bank charges and discrepancy risk end up in the per-tonne figure, and saying so plainly saves a week of negotiation.
A shipment travels with a commercial invoice, packing list, bill of lading, certificate of origin and the batch certificate of analysis. Import clearance runs through the Tanzania Revenue Authority, and imported goods are generally subject to conformity assessment administered by the Tanzania Bureau of Standards — which normally means a certificate is required before shipment rather than on arrival. Requirements change; confirm the current position with your clearing agent before the vessel loads.
SGS, Bureau Veritas, Intertek or the surveyor named in your contract can attend loading for quality and quantity. A batch test report is issued by our QC before every shipment regardless.
Useful references: the Tanzania Bureau of Standards publishes current conformity requirements for imported goods, TANROADS publishes the specifications most trunk road contracts are tendered against, and ASTM International maintains the D946 specification for penetration grade binders.
Packing and container loading
Packing choice drives both delivered cost and what you need at destination. On the Central Corridor it matters more than usual, because cargo heading inland faces a long road leg after discharge.
| Packing | Unit | Per 20′ container | Notes |
|---|---|---|---|
| Steel drum | 180 kg | 80 drums = 14.4 MT | New sealed drums; no heated discharge required, survives the long inland haul to Zambia, Rwanda or the DRC |
| Steel drum | 200 kg | 80 drums = 16.0 MT | Lowest packing cost per tonne in drummed form |
| Kraft bag | 25 kg | approx. 20 MT palletised | Oxidized grades only. Store under cover immediately on the humid coast |
| Jumbo bag | 300 kg | approx. 20 MT | Lower packing cost, requires forklift or crane at destination |
| Bulk bitutainer | 20–22 MT | 1 unit | Only where the receiving plant has heated tank storage. Rarely practical on a transit cargo |
Container figures are typical for standard 20′ dry containers and vary with the shipping line’s payload limit. Our minimum order of 100 MT is roughly seven containers of drummed product.
Frequently asked questions about bitumen supply in Tanzania
Which bitumen grade is right for road construction in Tanzania?
60/70 for most trunk and regional road work. Step down to 40/50 for the Dar es Salaam port approaches, container yards, airport pavements and the hotter central plateau. Use 80/100 in the highland districts around Mbeya, Iringa and Arusha, and for cold-mix patching on district roads.
Does the heavy coastal rainfall mean we should use a softer grade?
No. Penetration grade is matched to temperature, not moisture. What rainfall attacks is stripping, the bond between binder and aggregate, which is addressed through aggregate selection, mix design and anti-strip additives. A softer binder gives you rutting without solving the moisture problem.
Can you deliver to Zambia, the DRC, Rwanda, Burundi or Uganda through Dar es Salaam?
Yes. Dar es Salaam is the sea gateway of the Central Corridor and cargo landed there moves overland to all of them. The sea leg and the shipping documents match a Tanzanian cargo; the inland arrangement and the transit customs regime are separate and must be set up before arrival rather than after. Send us the final delivery point and we will price the whole route.
Should we discharge at Dar es Salaam, Tanga or Mtwara?
Dar es Salaam for most of the country and for anything moving inland, though congestion and demurrage are real costs there. Tanga is often cheaper on landed cost for projects in the Tanga, Kilimanjaro and Arusha regions despite smaller vessel options. Mtwara serves the southern regions and northern Mozambique. Send us the project location and we will price the alternatives.
What documents are required to import bitumen into Tanzania?
A commercial invoice, packing list, bill of lading, certificate of origin and a batch certificate of analysis travel with every shipment. Clearance runs through the Tanzania Revenue Authority, and imported goods are generally subject to conformity assessment administered by the Tanzania Bureau of Standards, which normally requires a certificate before shipment rather than on arrival. Confirm the current position with your clearing agent before the vessel loads.
What is the minimum order quantity?
100 MT, which is roughly seven 20′ containers of drummed product or five bulk bitutainers. Mixed grades within one shipment are accepted provided each grade reaches one full container.
What are your payment terms?
50% by TT in advance with the balance settled against a copy of the Bill of Lading. The advance covers production and loading; the balance falls due once the cargo is documented and on the water. We do not work on letters of credit.
What can we apply during the rainy season?
Emulsion grades are the most practical option, because water is already the carrier and cationic types tolerate damp aggregate. Cutback needs a genuinely dry surface and hot mix needs both dry conditions and a dry base. Nothing bonds to standing water, but emulsions are the most forgiving of residual moisture.
Do you supply cutback bitumen and emulsion to Tanzania?
Yes. MC, RC and SC cutback grades for prime coats and surface dressing, and anionic and cationic emulsions for tack coats and slurry seals. Both can be combined with penetration grades in the same shipment provided each product reaches one full container.
What is the price of bitumen in Tanzania?
It moves with crude and vacuum bottom, ocean freight, port handling and whether the cargo clears domestically or moves in transit across a border. Indicative levels are on our bitumen price page. Send quantity, packing, discharge port, final delivery point and Incoterm and we issue a firm quotation.
Specification
Bitumen 60/70
| Bitumen 60/70 | Test method | Unit | Specification |
|---|---|---|---|
| Specific gravity @ 25°C | ASTM D70 | Kg/cm3 | 1.01/1.06 |
| Penetration @ 25°C | ASTM D5 | mm/10 | 60/70 |
| Softening point °C | ASTM D36 | °C | 49/56 |
| Ductility @25 °C | ASTM D113 | cm | 100 min |
| Loss on heating(wt) % | ASTM D6 | wt % | 0.2 max |
| Drop in penetration after heating % | ASTM D5-D6 | % | 20 max |
| Flashpoint °C | ASTM D92 | °C | 232 min |
| Solubility in Trichloroethylene | ASTM D2042 | wt % | 99 min |
| Spot test | A.A.S.H.O.T102 | Negative |
Bitumen 80/100
| Bitumen 80/100 | Test method | Unit | Specification |
|---|---|---|---|
| Specific gravity @ 25°C | ASTM D70 | Kg/cm3 | 1.01/1.06 |
| Penetration @ 25°C | ASTM D5 | mm/10 | 80/100 |
| Softening point °C | ASTM D36 | °C | 42/50 |
| Ductility @25 °C | ASTM D113 | cm | 100 min |
| Loss on heating(wt) % | ASTM D6 | wt % | 0.2 max |
| Drop in penetration after heating % | ASTM D5-D6 | % | 20 max |
| Flashpoint °C | ASTM D92 | °C | 250 min |
| Solubility in CS2(wt) % | ASTM D4 | wt % | 99.5 min |
| Spot test | A.A.S.H.O.T102 | Negative |
Bitumen 40/50
| Bitumen 40/50 | Test method | Unit | Specification |
|---|---|---|---|
| Specific gravity @ 25°c | ASTM D70 | Kg/cm3 | 1.01/1.06 |
| Penetration @ 25°c | ASTM D5 | mm/10 | 40/50 |
| Softening point °c | ASTM D36 | °C | 52/60 |
| Ductility @25 °c | ASTM D113 | cm | 100 min |
| Loss on heating(wt) % | ASTM D6 | wt % | 0.2 max |
| Drop in penetration after heating % | ASTM D5-D6 | % | 20 max |
| Flash point °c | ASTM D92 | °C | 250 min |
| Solubility is CS2(wt) % | ASTM D4 | wt % | 99.5 min |
| Spot test | A.A.S.H.O.T102 | _____ | Negative |
Bitumen supply in other markets
Alongside our work as a bitumen supplier in Tanzania, we ship penetration, oxidized, cutback and emulsion grades across East and Southern Africa, West Africa, Southeast Asia and South America. See the global bitumen supply guide for country-level detail, or compare grades on our penetration grade bitumen page. Nearby markets we supply regularly include Uganda and Nigeria.
Order bitumen for Tanzania
Send us the grade, quantity, packing and the final delivery point — not just the discharge port — and we will come back with a firm price, a production schedule and the documentation list for clearance or transit. If you have a TANROADS specification or a tender document and are not sure which grade meets it, send the specification instead.
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