I use blue monster tape
https://www.supplyhouse.com/Blue-Monster-70885-TFE-Blue-Monster-1-2-PTFE-Thread-Seal-Tape?gclid=CjwKCAiA25v_BRBNEiwAZb4-ZfvKr3zZ-kzkvKqwN2VctYCuIQm8EY63hMpW5t3DL1RNPtMJHIk1kBoCHEMQAvD_BwE