Abstract: A caulking gun includes a tip which enables an adhesive, or other extrudable compound, to be laid down consistently, accurately, and rapidly along a base or base board or other elongated structure. The tip includes at least one guide which extends outside the plane of the surface of an outlet portion of the tip. The guide engages an edge of the base or base board, as the caulking gun is moved along the base or base board, and as the compound is extruded. As long as the guide is firmly engaged with the base or base board, the compound will be laid down consistently in neat, straight lines. In another embodiment, an attachment converts a caulking gun tip of the prior art into one having the essential features of the present invention. The invention enhances the productivity of construction personnel, and improves the quality of work, by virtually insuring that adhesives, or other compounds, are applied consistently and accurately.