This product works well on indoor and outdoor assets when it's necessary to identify if the label has been tampered with. If removed from its mating surface, a permanent void pattern is left in the label. The over laminate protects the image from scuffing and mild chemicals. Service range is -40°C to +150°C (but, the void pattern feature becomes permanently non-functional after exposure to +40°C). Minimum application temperature is +10°C. Storage stability is up to two years stored at +22°C. Face stock is 0.035 mm void polyester, over-laminated with a 0.025 mm polyester film, and a 0.025 mm pressure sensitive adhesive.