A crop harvesting header with a cutter bar and a draper assembly hasa draper driven by a drive roller at one end and an idler roller at the otherend. Thedraper is carried on a plurality of support rollers parallel to the first andsecondrollers for supporting the upper run of the draper at spaced positionstherealong. Thedraper includes a front edge of the upper run of the draper arranged at apositionadjacent to but spaced from the cutter bar and there is provided an integralextrudedsealing member extending along the cutter bar defining a first stiffer portionattachedto the cutter bar and a second flexible blade portion which extends rearwardlyfromthe first portion at the cutter bar to lie over and in contact with a beadalong a frontedge portion of the draper.
