There is at least 5 different thicknesses of tape try a thicker one, they are different colors which identifies the thickness. I use pink [2 thousands] and white [4 thousands] myself. I have seen yell blue and brown I thick [I don't see all colors the same as other people, don't see some of them at all. Lee
P.S. Ask Sabotloader he knows all about the Teflon tapes and will help anybody who asks.