Oatey Hercules 15127 High Density Professional Grade PTFE Thread Sealant, 1/2-Inch x 750-Inch Industrial heavy grade multi-purpose PTFE tape. High density, high quality. Self lubricates, easy-to-use. Industrial heavy grade multi-purpose PTFE tape High density, high quality Self lubricates, easy-to-use Ideal for lines carrying water, steam, oils and gases as well as acids, corrosive chemicals, refrigerants, fuels and solvents Compressible solid and is not affected by weather