Bitumen Penetration Grade 50/70 is a standard penetration grade Bitumen most commonly used in road construction, surfacing and some industrial application.

Penetration grade bitumens are specified by the penetration and softening point tests. Designation is by penetration range only, e.g. 50/70 pen bitumen has a penetration that ranges from 50 to 70 inclusive and a softening point of 46 to 54 C.