Abstract: A dust seal for a material conveyor belt and material chute includes an elongated body of a polygonal configuration. The body includes an axial bore defined within the body and extending the length thereof. An attachment device is included for securing the dust seal at a point upstream of the chute and on the belt to allow gravity and friction developed between the moving belt and the dust seal to move the dust seal to a position adjacent the chute so as to provide a seal to prevent the escape of material from around the chute.