VOID security seals- they are tamper-evident. An attempt to peel off results in appearing VOID pattern on the surface and on the back of the label. It is impossible to stick it again or reuse. They are appropriate for flat or slightly curved smooth surfaces. They can be slightly conductive, therefore they are not recommended for electrical systems. Before sticking the seal it’s necessary to clean and degrease the surface. Please conduct tests after 24h from sticking the seal.