VacMaster® VP321 replacement Seal Tape. Seal Tape covers the wires of the seal bar, so the wires don’t come in direct contact with vacuum packaging pouch. The tape is built to withstand the heat of the seal bar, and ensure a proper seal. Seal Tape may wear out over time, keep backups so your vacuum packaging machine never goes down. Easy to install. Direct replacement part for VacMaster VP31 Chamber Vacuum Sealers.