Blackburn offers four different types of marking tapes that meet the most exacting requirements.  There are detectable and non-detectable underground utility warning tapes, barricade tapes and flagging tapes.  Available, where appropriate, in AWPA colors, all Blackburn tapes are non-toxic, highly durable and suitable for marking water, sewer, electric and gas lines as well as excavation, construction, forestry, mining, geophysics, hardware and oil exploration sites.