Our 3M™ urethane primer daubers are built for the smooth and uncontaminated application of urethane primers. The wool applicator won't leave fibers or dyes that can contaminate the primer and compromise its effectiveness. The thin metal handle provides the right blend of durability and flexibility for even application. A hook at the end helps prevent drops that can contaminate the dauber. Designed specifically for applying urethane primers to bare metal pinch welds during windshield and other auto glass replacement, these 3M™ urethane primer daubers help ensure long-lasting, professional results in collision repair. Wool daubers are ideal for applying urethane primers that fill minor scratches and promote uniform urethane adhesion with auto windshields. The smooth, resilient surface helps ensure uniform application. And wool resists reaction with the primer, it won't degrade or leach fibers and dyes into the urethane which can cause failures later on. The wool applicator surface is supported by a thin metal handle that provides a balance of flexibility and firmness. A hook at the end helps prevent dropping the dauber so operators can get the most from each use. 3M™ urethane primer daubers work with 3M™ black urethane primer PN 08684 or 3M™ single step primer.