This is another method of marking edge lines and lane lines with a truck mounted machine or trailer transported unit. Extrusion is also known as ribbon line as the thick thermoplastic is extruded at about 195-215°C through a shoe with set width and thickness required. The hot extruded material is laid onto the road surface where the asphalt and the hot thermoplastic form a bond in contact. Glass Beads and aggregates are applied immediately behind the extruded lines to give initial skid resistance and Retro-Reflectivity.
Extrusion gives lines with good edge and thickness but the substrate has to be good, clean and dry. Hence it is not the best on coarse sealed roads compared to spray apply. Application rate is slower than spray. DPI Extrusion thermoplastic is available in both Alkyd and Hydrocarbon.