 In contrast, the major open application of PCBs was in carbonless copy ("NCR") paper, which even presently results in paper contamination.Other open applications were as plasticizers in paints and cements, stabilizing additives in flexible PVC coatings of electrical cables and electronic components, pesticide extenders, reactive flame retardants and sealants for caulking, adhesives, wood floor finishes, such as "Fabulon" and other products of Halowax in the U.S., de-dusting agents, waterproofing compounds, casting agents.It was also used as a plasticizer in paints and especially "coal tars" that were used widely to coat water tanks, bridges and other infrastructure pieces.