Attachment for an oral hygiene device, having a housing, a shaft element movably arranged within the housing and arranged for being coupled to a drive shaft of a handle of the oral hygiene device, and a flexible sealing element, in particular made from a natural or artificial rubber or a thermoplastic material such as an thermoplastic elastomer, attached to the shaft element, which flexible sealing element is arranged to seal a cavity within the attachment intended for accommodating at least a part of the drive shaft in an attached state.
