Abstract: A sealant applicator for applying a sealant to the countersink portion of a rivet bore in a workpiece includes an applicator head, a sealant supply, and a drive unit for moving the applicator head between the countersunk surface and the sealant supply. A sealant dauber is rotatably and adjustably mounted on the applicator head and is driven by a motor, also mounted on the head. A flexible applicator tip is fitted to one end of the dauber for receiving sealant from the sealant supply and applying it to the countersink surface. The sealant is supplied to the applicator tip from a reservior having an opening in which is located a sealant permeable member. Sealant is supplied to the reservoir from a sealant cartridge. A predetermined amount of sealant is passed through and is maintained above the permeable member before the applicator tip contacts the permeable member. When the applicator tip engages the permeable member a bead of sealant attaches to the tip.