a key - operated lock as is used in automobile doors and home doors , which device preferably comprising a base with a slot shaped cover secured aboout the lock . this base having a hinged cover and characterized by a slot shaped opening which fits about the lock . a plastic material within the cover and base is placed in a sealing relationship with the face of the lock and across the lock key entrance when the cover is in a closed position . the grooved base of the cover permits the opening or closing of the cover for use of the lock .