Sealed Rivets Sealed rivets are break mandrel blind rivets that guarantee a solid and high quality fastening.Completely sealed due to the locking of the mandrel inside the rivet body thereby avoiding leakage of liquids or vapours.Sealed rivets are available in a wide range of diameters, from 3.2mm to 6.4mm, with a grip range of 0.5mm to 20mm.Available in various materials to suit different applications.