Oatey 0.5-in x 21-ft Plumber's Tape in the Plumbers Tape department at Lowes.com
WOD Tape Plumbers Teflon Thread Seal Tape - 1/2 inch x 520 inch (500 Rolls) - Leak Proof Sealant for Water, Gas, Oil, Chemicals, Hydraulic and High Pressure Lines PTFE-35S - Walmart.com