Specification of bitumen penetration grade 40/60BAKHTAR BITUMEN Bitumen 40/60Test methodUnitSpecificationPenetration @ 25°cIP 49mm/1040/60Softening point °cIP 58°C48/56Kinematic Viscosity @ 135⁰CIP 370mm2/s325 minFlash point°cIP 36°C230 minSolubility is CS2(wt) %IP 47wt %99 min