the present invention relates to a predominantly biodegradable double - separating film and comprising at least one carrier layer that is based on at least one biodegradable polymer , and at least one release layer that is based on at least one cured polysiloxane . the curing of said release layer is based , at least partially , on at least one cross - linked monomer or oligomer additive . said additive also promotes adhesion between the carrier layer and the release layer , and has no siloxane groups but does have at least two functional groups , of which at least one is a functional group with at least one carbon double bond . no adhesion - promoting layer is present between the carrier layer and the release layer . in addition the invention relates to the use of such a separating film as a removable protection and cover film .