Systems, methods, and apparatus are disclosed for shaping sealant applied to a fastener. Tools disclosed herein include a housing that includes a first end, a second end, and a chamber, the first end including a first opening defining a first portion of the chamber, the second end being configured to be coupled to a robotic sealant applicator, the housing further including a second opening configured to transfer a solvent from an external reservoir to the chamber. The tools may also include a porous member included in the chamber, the porous member being configured to store an amount of solvent, the porous member being further configured to apply a designated shape to the sealant applied to the fastener in response to the sealant contacting the porous member, and the porous member being further configured release at least a portion of the solvent in response to the sealant contacting the porous member.