Cutback bitumen are classified into three groups depending on the relative speed of evaporation:

Rapid-curing (RC):
Bitumen cement combined with a light petroleum diluent of high volatility, generally with a boiling point similar to gasoline or naphtha. Grades include RC-30, RC-70, RC-250, RC-800, and RC-3000. The higher number indicates a higher viscosity.

Medium-curing (MC):
Bitumen cement combined with a petroleum diluent of intermediate volatility, generally with a boiling point similar to kerosene. Grades include MC-30, MC-70, MC-250, MC-800, and MC-3000.

Slow-curing (SC):
Bitumen cement combined with a petroleum diluent of low volatility, generally with a boiling point similar to fuel oil. Grades include SC-70, SC-250, SC-800, and SC-8000.

Cutback bitumen are most commonly used in road mixing operations, stockpile mixes, and spray applications such as prime, tack and seal coats.

Application Rate - From 0.6 liter per m²
Spraying / Application Temperature - 60 - 80°C