What Is Bitumen 60/70? Bitumen 60/70 is a medium-hard penetration-grade bitumen with a needle penetration value between 60 and 70 deci-millimeters (dmm) at 25°C, tested per ASTM D5. It is produced through the vacuum distillation of crude oil residues and is the most widely exported paving-grade bitumen in the world. Its softening point of 49–56°C, […]
