Thermal-transfer printable thermoplastic labels that adhere strongly to paraffin wax blocks and other hard-to-stick surfaces such as Teflon, Polytetrafluoroethylene (PTFE), Perfluoroalkoxy (PFA), Parchment paper, etc. ParafiTAG™ labels are water- and chemical-resistant, ideal for identifying paraffin wax blocks for histology applications. A chemical-resistant printout is obtained when printed with our XAR-class of solvent-resistant ribbons. The labels and printed information will resist xylene, toluene, alcohol, and other solvents and chemical exposure without additional protection.