A strapping sealer or crimping tool is used to crimp tightly closed strapping seals, crimps, onto plastic or polyester strapping.

The C3304 sealer is a 12mm crimper and can be used with 12mm standard seals and 12mm heavy-duty seals.

Heavy-duty seals are for use with the PR300 polypropylene strapping

Strapping sealers are normally used with a P330 tensioning tool.