Abstract: A hand held applicator tool adapted to work a mass of filler material into a gap to form a seal between two pieces. The tool includes a handle having attached thereto a tapered head defined by tapered lateral side edges thereof which cooperate to define a tip as well as a working surface. The head being upturned in the area adjacent the tip and including a rim margin adjacent the side edges and the tip wherein the rim margin is made of a flexible and resilient material. The tool may further have working tips each having a different radius of curvature so as to seal a gap having at least two different bead widths.