Embodiments associated with a gel locking mechanism for ultrasound devices are described. The locking mechanism is formed as an attached adaptor or as part of an ultrasound device. In one embodiment, an adaptor device includes a housing formed with a mounting end and a gel receiving end wherein the gel receiving end includes a side wall formed from the housing that defines a gel cavity for receiving a solidified gel. The adaptor device includes a cap formed with a frame and having a central opening defined therethrough, wherein the frame is configured to lock to and unlock from the gel receiving end of the housing.