Brady's Tamperseals are designed for sealing access points, protecting adjustments and sealing enclosures. Tamperseals come in a 20-page pocket size book. Brady also offers printable tamper evident labels for use with thermal transfer, laser and dot matrix printers. See our Printable Labels category of the Labels section for more information on these products. Brady B-351 is designed to fracture easily in order to show signs of product tampering and to prevent one-piece label removal. Use caution when removing from liner as material is fragile. B-351 is not recommended for use in harsh solvents such as MEK, Acetone, and 1,1,1-Trichloroethane. We recommend Brady series R6200 and R6000 black ribbons. Brady B-351 is RoHS compliant to 2005/618/EC MCV amendment to RoHS Directive 2002/95/EC.