The sealing foil consists of laminated ALU-PE material. Suitable for IBC valves in DN50, for example valve and ball valves, cone or screwable drain valves in S60x6.2" NPS and 2"1/8 BSP. The sealing foil is hot pressed on the tap outlet of the IBC (Intermediate Bulk Container). Just use a small mini iron to attach it. Expensive material is not necessary for this.