An isolated, synthetic preparation of a novel neutrophil-specific chemotactic factor, monoclonal antibodies having specific binding affinity for NCF and a clone containing the complete cDNA coding sequence for NCF are disclosed. A piston is disposed in the bore and slidable therein. The fungi resistant asphalt is at least partially absorbed by the base sheet to form the fungi resistant asphalt containing sheet material and typically forms one or both major surfaces of the fungi resistant asphalt containing sheet material.