A chuck for a machine tool includes a body rotatable about a rotation axis and defining a plurality of slots extending radially in the body, a plurality of jaws received in corresponding ones of the plurality of slots, the jaws being radially movable relative to the body between an inward position and an outward position, and for at least one of the plurality of jaws, a sealing layer disposed in the slot receiving the at least one of the plurality of jaws and sealing an interface between opposed lateral sides of the at least one jaw and a surface of the body defining the slot receiving the at least one of the plurality of jaws. A method of sealing an interface between a surface defining a slot of a chuck is also described.