Underground Tape is used to easily identify buried utility lines, pipes, cables and conduits. It is a 4 mil, non-adhesive, polyethlene tape with a printed continuous warning that is resitant to alkalies, acids, and other soil components. For proper installation, underground tape should be installed 12''-18'' below ground level and 12'' directly above buried pipes, utility lines, cables and conduits before final backfilling. Meets APWA color code.