11MM POLY CRIMP™ SEALS. A crimp cap constructed of plastic that fits virtually any 11mm crimp sample vial. Use a standard crimping tool to securely crimp the Poly Crimp™ seal onto any crimp top vial. The Poly Crimp™ seal also permits an airtight seal by hand without crimping. Although the Poly Crimp™ seal can work with any crimp top