Which do you use and why? (If Rector Seal which product) How long have you been using it? Observed failure rate? I've always used Teflon tape. I have never been real comfortable with any of the setting liquid based products. I've been using tape for at least 15 years and never seen it fail once a good seal is established. I was looking at some of the Rector Seal products today. The "T plus 2" and "no. 100 virgin" look to be good products as they are non-setting. Is it time to try something new, I don't know.