SC-250 Cutback Bitumen — Controlled-Curing Binder for Surface Treatments & Base Priming

SC-250 is a higher-viscosity slow-curing cutback bitumen engineered for controlled curing and stronger binder retention. Suited for prime coats, surface treatments, and low-to-medium traffic road applications.

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What Is Cutback SC-250 Bitumen?

Cutback SC-250 is a slow-curing bitumen made by blending penetration-grade bitumen with low-volatility solvents, giving it a notably higher viscosity than SC-30 and SC-70. This slower, more controlled curing improves binder retention and produces a stronger bond once the solvent has fully evaporated.

A kinematic viscosity of 250–500 mm²/s at 60°C, with a flash point of 60°C or higher, allows SC-250 to be handled safely while depositing a thicker, more durable binder film than the lighter SC grades. Its higher viscosity residue reflects the improved strength and coating retention this grade delivers.

SC-250 is typically supplied to ASTM standards, with a negative spot test confirming solvent compatibility. It’s commonly used for prime coats on granular bases, surface treatments, soil stabilization, and low to medium-traffic road applications.

SC 250 Specification

SC 250 CutBack Bitumen Specifications

Essential Details

Test Method

Unit

Min.

Max.

  • Kinematic Viscosity at 60 °C (140 °F)
  • ASTM D2170
  • mm²/s
  • 250
  • 500
  • Flash Point (Tag Open-Cup)
  • ASTM D92
  • °C
  • 60
  • -
  • Total Distillate to 360 °C (680 °F)
  • ASTM D402
  • vol.%
  • -
  • 25
  • Solubility in Trichloroethylene
  • ASTM D2042
  • %
  • 95
  • 70
  • Kinematic Viscosity of Residue at 60 °C (140 °F)
  • ASTM D2170
  • mm²/s
  • 400
  • 10000
  • Residue of 100 Penetration
  • ASTM D2710
  • %
  • 50
  • -
  • Ductility of 100 Penetration Residue at 25 °C (77 °F)
  • ASTM D2170
  • cm
  • 50
  • -
  • Water Content
  • ASTM D95
  • %
  • -
  • 0.5
  • Spot Test
  • ASHTO T102
  • Negative

SC 250 MSDS

pdf

SC 250 Safety Data Sheet

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    Our faqs

    Frequently Asked Questions.

    Our SC-250 bitumen is a slow-curing cutback grade with higher viscosity, engineered for deep penetration and durable bonding in prime coat and base preparation works.

    SC-250 is a slow-curing cutback bitumen with higher viscosity, produced by blending penetration-grade bitumen with low-volatility solvents for gradual curing.

    2. Where is SC-250 commonly used?

    SC-250 is commonly used in:

    • Prime coats on granular base courses
    • Surface treatments
    • Soil stabilization
    • Low to medium traffic roads

    SC-250 has higher viscosity and slower curing, providing better binder retention and stronger bonding.

    • Deep penetration with improved durability
    • Controlled curing and uniform coating
    • Reduced risk of premature setting
    • Suitable for ambient temperature application

    SC-250 should be stored in sealed tanks or drums, kept away from heat and ignition sources, and handled with proper ventilation due to solvent content.