The Ribi Seal consists of two films that are laminated together.
The inside layer, in contact with the bottle, is an elastomer with good sealing and mechanical gripping properties.
The second layer is external and has the mechanical stability necessary to prevent any damage caused by stacking and transportation.
This layer can also be printed on.
Both layers have special physical, chemical and mechanical properties, they are made of non-toxic and food-grade materials which comply with FDA standards (U.S. Food and Drug Administration), and provide an excellent barrier against bacteria.
The seal adhesion to the glass container is mechanical, no glue or other bonding agents are used and its removal operation ensures that there is no risk of plastic fragments falling inside the container, thus preserving its sterility.