A system and method for sealing around openings in a telephone handset casing in which externally facing components are positioned. An exemplary method comprises applying a bead of liquid sealant around the opening in a telephone handset casing, allowing the bead to partially cure to form a skin yet still having a malleable consistency, and placing the externally facing component against the bead to deform the bead in conformance with the surface of the component, to provide a close seal between the casing and the component.