A corner bracket suitable for a cabinet for enclosing fibre optic equipment, the corner bracket comprising: a structural portion comprising at least one first material; a sealing portion at least partially covering the structural portion and comprising at least one second material, wherein the at least one first material is relatively more rigid than the at least one second material, and the at least one second material is relatively more elastic than the at least one first material; a first retainer configured to receive an end of a first frame member, the first retainer at least partially comprising the at least one first material and defining a first longitudinal axis; a second retainer coupled to the first retainer and defining a second longitudinal axis substantially perpendicular to the first longitudinal axis of the first retainer, the second retainer configured to receive an end of a second frame member such that the first frame member and the second frame member are substantially perpendicular with respect to one another when respectively received by the first retainer and the second retainer, and the second retainer at least partially comprising the at least one first material; a first exterior surface at least partially defined by the first retainer and at least partially comprising the at least one second material, the first exterior surface comprising a first door panel interface configured to provide a seal between the first exterior surface and an interior surface of a first door panel in a closed position; and a second exterior surface at least partially defined by the second retainer and at least partially comprising the at least one second material, the second exterior surface comprising a second door panel interface configured to provide a seal between the second exterior surface and an interior surface of a second door panel in a closed position, the first door panel interface and the second door panel interface substantially perpendicular with respect to one another. a structural portion comprising at least one first material; a sealing portion at least partially covering the structural portion and comprising at least one second material, wherein the at least one first material is relatively more rigid than the at least one second material, and the at least one second material is relatively more elastic than the at least one first material; a first retainer configured to receive an end of a first frame member, the first retainer at least partially comprising the at least one first material and defining a first longitudinal axis; a second retainer coupled to the first retainer and defining a second longitudinal axis substantially perpendicular to the first longitudinal axis of the first retainer, the second retainer configured to receive an end of a second frame member such that the first frame member and the second frame member are substantially perpendicular with respect to one another when respectively received by the first retainer and the second retainer, and the second retainer at least partially comprising the at least one first material; a first exterior surface at least partially defined by the first retainer and at least partially comprising the at least one second material, the first exterior surface comprising a first door panel interface configured to provide a seal between the first exterior surface and an interior surface of a first door panel in a closed position; and a second exterior surface at least partially defined by the second retainer and at least partially comprising the at least one second material, the second exterior surface comprising a second door panel interface configured to provide a seal between the second exterior surface and an interior surface of a second door panel in a closed position, the first door panel interface and the second door panel interface substantially perpendicular with respect to one another.