Bitumen MC70 – Medium Curing Cutback Bitumen from Basekim

Bitumen MC70 in sealed steel drums, supplied by Basekim for prime coating and surface treatment in road construction projects.

Bitumen MC70 is a medium-curing cutback bitumen used to prime road bases, strengthen unbound layers, and prepare surfaces before hot mix asphalt. It delivers the ideal balance between penetration, adhesion, and curing speed. Because it flows smoothly and penetrates deeply into granular bases, it creates a strong bond that makes asphalt layers last longer. Contractors choose MC70 when they need a binder that works fast enough for efficient paving but slow enough to form a durable, uniform film. This balanced performance is why MC70 remains one of the most reliable solutions for road construction worldwide.

At Basekim, we manufacture and supply premium Bitumen MC70 for projects that demand consistency, safety, and long-term performance. Because we control production, testing, packaging, and delivery, our customers receive guaranteed quality on every order.

What Makes Bitumen MC70 Essential in Road Construction?

Bitumen MC70 works as a prime coat that prepares a road base to receive asphalt. When construction crews spray the material on an unbound or stabilized base layer, its kerosene component helps the bitumen flow and penetrate deeply. As the solvent evaporates, the remaining binder forms a tough, sticky film.

This bonding layer is extremely important because:

  • It reduces dust and stabilizes the base

  • It ensures strong adhesion between base and asphalt

  • It prevents moisture from weakening lower layers

  • It improves long-term durability of the pavement

Because MC70 requires no heating, crews can apply it using simple spraying equipment. This reduces fuel consumption, lowers operational risks, and speeds up project timelines. Moreover, its medium curing rate works well in warm and moderate climates, offering better control than rapid curing grades and faster drying than slow curing ones.

How Bitumen MC70 Performs on the Jobsite

When applied correctly, MC70 delivers predictable and stable performance. Here is how the curing process works step by step:

  1. Application – The material is sprayed evenly across the prepared base.

  2. Penetration – Its kerosene content allows deep absorption into the granular layer.

  3. Evaporation – The solvent evaporates slowly, leaving bitumen behind.

  4. Bond Formation – A tough, cohesive film forms on the surface.

  5. Asphalt Placement – Hot mix asphalt adheres strongly to the primed base.

Because MC70 flows well even at moderate temperatures, it allows teams to work efficiently without specialized heating systems. This flexibility makes it suitable for highways, rural roads, access roads, industrial pavements, and emergency repairs.

Bitumen MC70 Technical Specifications (ASTM Standard)

At Basekim, every batch of MC70 undergoes strict laboratory testing. You receive consistent viscosity, purity, and performance, ensuring predictable results in the field.

PropertyTest MethodSpecification
Kinematic Viscosity @ 60°CASTM D217070–140 cSt
Flash Point (TOC)ASTM D3143Min 38°C
Distillation ResidueASTM D402Min 55% by volume
Penetration of ResidueASTM D5100–200 dmm
Ductility of ResidueASTM D113Min 100 cm
Solubility in TCEASTM D2042Min 99%

With every shipment, we include:

  • Certificate of Analysis (COA)

  • Technical Data Sheet (TDS)

  • Material Safety Data Sheet (MSDS)

These documents support smoother customs clearance and guarantee compliance with international specifications.

Key Advantages of Using Bitumen MC70

Bitumen MC70 offers multiple benefits for contractors, engineers, and government infrastructure planners. Because it performs well in a wide range of climates and soil conditions, it has become one of the most trusted prime-coat materials.

1. No Heating Required

You can apply MC70 at ambient temperature. This reduces:

  • Equipment costs

  • Fuel consumption

  • Worker risk

  • Environmental impact

2. Strong Penetration Into Road Bases

Its controlled solvent blend allows deep absorption, creating a highly stable base and better load distribution.

3. Ideal Curing Speed

MC70 cures faster than slow-curing grades like SC250, yet slower than rapid-curing grades like RC70. This balance means:

  • Less waiting time

  • Proper formation of adhesive bonds

  • Improved performance under traffic

4. Enhanced Pavement Durability

Because MC70 forms a strong tie between layers, it prevents:

  • Delamination

  • Premature cracking

  • Moisture damage

  • Surface deformation

5. Versatile Applications

Engineers also use Bitumen MC70 for:

  • Dust control operations

  • Prime coating of granular and stabilized bases

  • Light spray sealing

  • Rural road strengthening

  • Patch repairs in developing regions

Where Bitumen MC70 Is Used Most Effectively

MC70 performs well in:

  • Tropical and warm climates with moderate to high temperatures

  • Urban paving projects where fast work cycles matter

  • Remote construction sites that lack heating equipment

  • Road bases with medium absorption

  • Infrastructure upgrades requiring reliable bonding

Because of its adaptability, MC70 remains a preferred choice for governments and private contractors across Asia, the Middle East, Africa, and South America.

Basekim – Trusted Manufacturer and Global Supplier of Bitumen MC70

Basekim supplies premium Bitumen MC70 to more than 30 international markets. We manage the entire chain—production, laboratory testing, packaging, and logistics—so you receive guaranteed quality and on-time delivery.

Why clients choose Basekim:

  • Consistent ASTM-standard production

  • Modern labs for quality control

  • Competitive pricing due to in house manufacturing

  • Fast loading and flexible shipment plans

  • 24/7 customer support

  • Clean documentation for customs processes

Packaging Options Available

We supply Bitumen MC70 in:

  • New steel drums

  • IBC tanks

  • Bulk ISO tanks

  • Flexitanks (on request)

Your order is prepared exactly according to your requirements.

Basekim’s Full Medium-Cur­ing Product Range

To support all types of projects, Basekim also manufactures:

  • Bitumen MC30 – lighter grade for deeper penetration

  • Bitumen MC250 – heavier grade for thicker film and slower curing

If you need other cutback types, we also supply:

  • SC grades: SC70, SC250

  • RC grades: RC70, RC250

By working with one supplier, you simplify procurement, reduce delivery time, and maintain uniform product quality across all job sites.

Q1: What is bitumen MC70 used for?

A: Bitumen MC70 is a medium curing cutback bitumen commonly used for prime coats and surface treatments in road construction. Its moderate evaporation rate provides good penetration into base materials, creating a strong foundation for asphalt layers.

A: Bitumen MC70 cures faster than SC70 due to its medium curing properties. This makes it ideal for projects requiring quicker setting times while still maintaining adequate penetration and adhesion.

A: Bitumen MC70 typically has a kinematic viscosity of 70–140 cSt at 60°C, a flash point above 38°C, and a minimum residue by distillation of 55%. These characteristics ensure consistent performance in road construction (See full specifications).