Cutback Bitumen

1. Rapid Curing (RC) Cutback Bitumen

Overview:
RC grades combine bitumen with highly volatile solvents (e.g., naphtha or low‑boiling gasoline), enabling fast evaporation and binder setting.

Key Properties:

• Solvent Type: Naphtha / Gasoline

• Curing Time: 30–60 minutes

• Viscosity (at 25 °C): 20–100 cSt

Typical Uses:

• Surface treatments and distributor sprays

• Tack coats for new overlays

• Emergency pothole repairs in mild climates

2. Medium Curing (MC) Cutback Bitumen

Overview:
MC grades use kerosene‑based solvents for medium‑speed evaporation, balancing workability and setting time.

Key Properties:

• Solvent Type: Kerosene

• Curing Time: 2–4 hours

• Viscosity (at 25 °C): 100–300 cSt

Typical Uses:

• Cold mixes for patching

• Road base binder courses

• Maintenance overlays where extended handling is needed

3. Slow Curing (SC) Cutback Bitumen

Overview:
SC grades utilize heavy oils or diesel as solvents, providing prolonged workability and deep substrate penetration.

Key Properties:

• Solvent Type: Diesel / Heavy oil

• Curing Time: 8–24+ hours

• Viscosity (at 25 °C): 300–1,000 cSt

Typical Uses:

• Primer applications on low‑porosity surfaces

• Dust control on unpaved roads

• Binding moist or fine aggregates in cold climates

Technical Data Sheet