Lightlock Fire Seals are a plastic security seal that has been developed primarily for securely sealing fire extinguishers after their annual test. The low break strain allows easy, manual removal in cases of emergency. These plastic seals are easy to seal and require no tools for removal. This seal provides up to 30 locking positions and is moulded in high quality food grade polypropylene. Insert strap into locking chamber and draw up tight. Record security seal number and contents for later verification.