Tamper Evident VOID Labels

  • Easy-to-install, UL-recognized and barcode ready
  • Leaves “VOID” message when removed
  • Durable for harsh environments
  • RFID available

Related products


SmartMark RFID Logo


Our tamper evident products destruct when removal is attempted. If the adhesive layer is fractured, the word VOID appears on the applied surface, indicating tampering. Their durable polyester material withstands harsh environments and bonds well to a variety of surfaces including stainless steel, ABS, polypropylene, painted metal, polyester, HDPE, nylon, glass, and polycarbonates. Maximize your security with RFID – ideal for food and beverage establishments.


Additional information

Model Number

WFC-AC-VOID Tamper Evident Labels


Tamper Evident Seals, Product Marking


Destructible Polyester Film

Overall Thickness

2.3 mil

Expected Outdoor Life

1 – 2 years

Temperature Service Range

-40°F to 208°F

Minimum Application Temperature


Water Resistance


Solvents Resistance

Very Good

Abrasion Resistance


UV Resistance


Oil Resistance

Very Good


#300 High Strength Acrylic


Adhesion to HSE Plastics: Excellent, Adhesion to LSE Plastics: Excellent, Adhesion to Glass at 72 hr. dwell: Excellent, Adhesion to Steel at 72 hr. dwell: Excellent

RFID Performance

RFID Protocol UHF EPC Class 1 Gen 2; ISO 18000-6C
Tag Type Passive Read/Write
Frequency Range 860 – 960 MHz (Global)

*Other single record and dual record chips available.

Tested Polarization:

Tag performance was experimentally measured in an anechoic chamber with a known set of experimental variables. The antenna used for measurements was linearly polzarized and of monostatic configuration. The direction of tested polarization is as follows.

RFID Secura-T Flag Tag Polarization Image

Optimal Read Range* on Different Material Surfaces:

RFID Secura-T Flag Tag Read Range Graph

*Tag performance was measured free of material influence. Actual read ranges may differ depending on conditions such as environment, tag placements, hardware, etc.