Non-adhesive tamper-evident seals are used on padlocks, fire extinguishers and safety doors to prevent tampering. Plastic padlock seals have wire hasps that must be cut to be removed and plastic seals that blush when tampered with. Fire extinguisher seals are plastic ties wrapped around the extinguisher's handle to prevent tampering. They manually break away for emergency use. Plastic ties can also be used to seal safety doors, cabinets and canisters.