Our selection of compact padlock and pull-through security seals are designed specifically for airline needs during in-flight operation — securing duty-free trolleys, safety cabinets, stowage boxes and other small enclosures. Seals are used for three key reasons: to deter opportunist theft; to prevent unauthorised items being placed inside enclosures; and to comply with HM Revenue & Customs regulations preventing the sale of duty free products until an aircraft is airborne.