It's not going to hurt anything to try it, but the best thing is to replace the TV coax cable or at least the bad section on the roof, assuming you have a stub in good enough condition to put a connection on, and can remove the bad area and connect in New coax splice threaded in, then cover with liquid tape or plastic dip,
In fact you might try lquid tape to replace the fix that didn't work,
No doubt you squeezed the coax when you wrapped it, doing this changed the reactive capacitance of the coax,
Remove the tape fix, try to make the coax as round as possible and then cover it with liquid tape, it will seal out moisture without squeezing the coax