A bitumen pressure distributor applies hot bitumen evenly across a defined width of road surface for three main purposes: tack coat (bonding a new asphalt layer to the one beneath it), prime coat (sealing a prepared granular sub-base before surfacing), and chip-seal/surface dressing (sealing and rejuvenating an existing road surface). Its pressurized spray bar ensures a consistent application rate across the full width in a single pass.