OptiBond FL Introductory Kit FL = Filled and light-cured. This dentin/enamel adhesive system works as an adhesive and a liner in one material. It is a 48% glass filled bonding system and provides a structural bond. Simple to use; no mixing and only one light-cure is required. Contains: 8ml OptiBond FL Prime, 8ml OptiBond FL Adhesive, 1 x 3g Syringe Gel Etchant, 10 Disposable Gel Etchant Syringe Tips, 25 Disposable Mixing Wells, 50 Disposable Kerr Applicator Tips