Martin's Eraser Max Super Concentrate Herbicide qt. Eraser Max is ideal for fence rows, gravel paths, sidewalks, driveways, parking areas and around farm building and barns. The concentrated formula of glyphosate and imazapyr is effective against most weeds, grasses, vines, brush and trees. For use on non-crop areas as a spot treatment for brush, vines, and weeds or on bare ground for total vegetation control. Fast acting.One application kills weeds for up to 1 year.One quart treats up to 4,324 square feet.