Tamper Evident Security Tape is a self adhesive packaging tape that incorporates an indicator designed to provide visual evident that tampering has occurred. Tamper Evident Security Tape is also known as: Tamper-tell tape, Void Tape, Security Tape, 2 Part Tape, Hidden Message Tape and Break-up Tape (not void tape). The tape appears to be one colour when applied; however if violated, the tape reveals a hidden void message and the colour also changes.